Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c4d3efaf | 2 | * IPv6 tunneling device |
1da177e4 LT |
3 | * Linux INET6 implementation |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Ville Nuorvala <vnuorval@tcs.hut.fi> |
c4d3efaf | 7 | * Yasuyuki Kozakai <kozakai@linux-ipv6.org> |
1da177e4 | 8 | * |
1da177e4 | 9 | * Based on: |
c4d3efaf | 10 | * linux/net/ipv6/sit.c and linux/net/ipv4/ipip.c |
1da177e4 LT |
11 | * |
12 | * RFC 2473 | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License | |
16 | * as published by the Free Software Foundation; either version | |
17 | * 2 of the License, or (at your option) any later version. | |
18 | * | |
19 | */ | |
20 | ||
f3213831 JP |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
1da177e4 | 23 | #include <linux/module.h> |
4fc268d2 | 24 | #include <linux/capability.h> |
1da177e4 LT |
25 | #include <linux/errno.h> |
26 | #include <linux/types.h> | |
27 | #include <linux/sockios.h> | |
c4d3efaf | 28 | #include <linux/icmp.h> |
1da177e4 LT |
29 | #include <linux/if.h> |
30 | #include <linux/in.h> | |
31 | #include <linux/ip.h> | |
1da177e4 LT |
32 | #include <linux/net.h> |
33 | #include <linux/in6.h> | |
34 | #include <linux/netdevice.h> | |
35 | #include <linux/if_arp.h> | |
36 | #include <linux/icmpv6.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/route.h> | |
39 | #include <linux/rtnetlink.h> | |
40 | #include <linux/netfilter_ipv6.h> | |
5a0e3ad6 | 41 | #include <linux/slab.h> |
ddbe5032 | 42 | #include <linux/hash.h> |
e837735e | 43 | #include <linux/etherdevice.h> |
1da177e4 LT |
44 | |
45 | #include <asm/uaccess.h> | |
60063497 | 46 | #include <linux/atomic.h> |
1da177e4 | 47 | |
c4d3efaf | 48 | #include <net/icmp.h> |
1da177e4 | 49 | #include <net/ip.h> |
c5441932 | 50 | #include <net/ip_tunnels.h> |
1da177e4 | 51 | #include <net/ipv6.h> |
1da177e4 LT |
52 | #include <net/ip6_route.h> |
53 | #include <net/addrconf.h> | |
54 | #include <net/ip6_tunnel.h> | |
55 | #include <net/xfrm.h> | |
56 | #include <net/dsfield.h> | |
57 | #include <net/inet_ecn.h> | |
13eeb8e9 PE |
58 | #include <net/net_namespace.h> |
59 | #include <net/netns/generic.h> | |
8d79266b | 60 | #include <net/dst_metadata.h> |
1da177e4 LT |
61 | |
62 | MODULE_AUTHOR("Ville Nuorvala"); | |
c4d3efaf | 63 | MODULE_DESCRIPTION("IPv6 tunneling device"); |
1da177e4 | 64 | MODULE_LICENSE("GPL"); |
f98f89a0 | 65 | MODULE_ALIAS_RTNL_LINK("ip6tnl"); |
6dfbd87a | 66 | MODULE_ALIAS_NETDEV("ip6tnl0"); |
1da177e4 | 67 | |
e87a8f24 JK |
68 | #define IP6_TUNNEL_HASH_SIZE_SHIFT 5 |
69 | #define IP6_TUNNEL_HASH_SIZE (1 << IP6_TUNNEL_HASH_SIZE_SHIFT) | |
1da177e4 | 70 | |
f4e0b4c5 ND |
71 | static bool log_ecn_error = true; |
72 | module_param(log_ecn_error, bool, 0644); | |
73 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
74 | ||
ddbe5032 ED |
75 | static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2) |
76 | { | |
77 | u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2); | |
78 | ||
e87a8f24 | 79 | return hash_32(hash, IP6_TUNNEL_HASH_SIZE_SHIFT); |
ddbe5032 | 80 | } |
1da177e4 | 81 | |
8560f226 | 82 | static int ip6_tnl_dev_init(struct net_device *dev); |
3144581c | 83 | static void ip6_tnl_dev_setup(struct net_device *dev); |
c075b130 | 84 | static struct rtnl_link_ops ip6_link_ops __read_mostly; |
1da177e4 | 85 | |
f99189b1 | 86 | static int ip6_tnl_net_id __read_mostly; |
13eeb8e9 | 87 | struct ip6_tnl_net { |
15820e12 PE |
88 | /* the IPv6 tunnel fallback device */ |
89 | struct net_device *fb_tnl_dev; | |
3e6c9fb5 | 90 | /* lists for storing tunnels in use */ |
e87a8f24 | 91 | struct ip6_tnl __rcu *tnls_r_l[IP6_TUNNEL_HASH_SIZE]; |
94767632 ED |
92 | struct ip6_tnl __rcu *tnls_wc[1]; |
93 | struct ip6_tnl __rcu **tnls[2]; | |
8d79266b | 94 | struct ip6_tnl __rcu *collect_md_tun; |
13eeb8e9 PE |
95 | }; |
96 | ||
8560f226 ED |
97 | static struct net_device_stats *ip6_get_stats(struct net_device *dev) |
98 | { | |
56a4342d | 99 | struct pcpu_sw_netstats tmp, sum = { 0 }; |
8560f226 ED |
100 | int i; |
101 | ||
102 | for_each_possible_cpu(i) { | |
abb6013c | 103 | unsigned int start; |
8f84985f LR |
104 | const struct pcpu_sw_netstats *tstats = |
105 | per_cpu_ptr(dev->tstats, i); | |
8560f226 | 106 | |
abb6013c | 107 | do { |
57a7744e | 108 | start = u64_stats_fetch_begin_irq(&tstats->syncp); |
abb6013c LR |
109 | tmp.rx_packets = tstats->rx_packets; |
110 | tmp.rx_bytes = tstats->rx_bytes; | |
111 | tmp.tx_packets = tstats->tx_packets; | |
112 | tmp.tx_bytes = tstats->tx_bytes; | |
57a7744e | 113 | } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); |
abb6013c LR |
114 | |
115 | sum.rx_packets += tmp.rx_packets; | |
116 | sum.rx_bytes += tmp.rx_bytes; | |
117 | sum.tx_packets += tmp.tx_packets; | |
118 | sum.tx_bytes += tmp.tx_bytes; | |
8560f226 ED |
119 | } |
120 | dev->stats.rx_packets = sum.rx_packets; | |
121 | dev->stats.rx_bytes = sum.rx_bytes; | |
122 | dev->stats.tx_packets = sum.tx_packets; | |
123 | dev->stats.tx_bytes = sum.tx_bytes; | |
124 | return &dev->stats; | |
125 | } | |
126 | ||
1da177e4 | 127 | /** |
3144581c | 128 | * ip6_tnl_lookup - fetch tunnel matching the end-point addresses |
1ab1457c YH |
129 | * @remote: the address of the tunnel exit-point |
130 | * @local: the address of the tunnel entry-point | |
1da177e4 | 131 | * |
1ab1457c | 132 | * Return: |
1da177e4 | 133 | * tunnel matching given end-points if found, |
1ab1457c | 134 | * else fallback tunnel if its device is up, |
1da177e4 LT |
135 | * else %NULL |
136 | **/ | |
137 | ||
2922bc8a ED |
138 | #define for_each_ip6_tunnel_rcu(start) \ |
139 | for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) | |
140 | ||
1da177e4 | 141 | static struct ip6_tnl * |
b71d1d42 | 142 | ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local) |
1da177e4 | 143 | { |
ddbe5032 | 144 | unsigned int hash = HASH(remote, local); |
1da177e4 | 145 | struct ip6_tnl *t; |
3e6c9fb5 | 146 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
ea3dc960 | 147 | struct in6_addr any; |
1da177e4 | 148 | |
ddbe5032 | 149 | for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { |
1da177e4 LT |
150 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
151 | ipv6_addr_equal(remote, &t->parms.raddr) && | |
152 | (t->dev->flags & IFF_UP)) | |
153 | return t; | |
154 | } | |
ea3dc960 SK |
155 | |
156 | memset(&any, 0, sizeof(any)); | |
157 | hash = HASH(&any, local); | |
158 | for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { | |
159 | if (ipv6_addr_equal(local, &t->parms.laddr) && | |
160 | (t->dev->flags & IFF_UP)) | |
161 | return t; | |
162 | } | |
163 | ||
164 | hash = HASH(remote, &any); | |
165 | for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { | |
166 | if (ipv6_addr_equal(remote, &t->parms.raddr) && | |
167 | (t->dev->flags & IFF_UP)) | |
168 | return t; | |
169 | } | |
170 | ||
8d79266b AS |
171 | t = rcu_dereference(ip6n->collect_md_tun); |
172 | if (t) | |
173 | return t; | |
174 | ||
2922bc8a ED |
175 | t = rcu_dereference(ip6n->tnls_wc[0]); |
176 | if (t && (t->dev->flags & IFF_UP)) | |
1da177e4 LT |
177 | return t; |
178 | ||
179 | return NULL; | |
180 | } | |
181 | ||
182 | /** | |
3144581c | 183 | * ip6_tnl_bucket - get head of list matching given tunnel parameters |
1ab1457c | 184 | * @p: parameters containing tunnel end-points |
1da177e4 LT |
185 | * |
186 | * Description: | |
3144581c | 187 | * ip6_tnl_bucket() returns the head of the list matching the |
1da177e4 LT |
188 | * &struct in6_addr entries laddr and raddr in @p. |
189 | * | |
1ab1457c | 190 | * Return: head of IPv6 tunnel list |
1da177e4 LT |
191 | **/ |
192 | ||
94767632 | 193 | static struct ip6_tnl __rcu ** |
c12b395a | 194 | ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p) |
1da177e4 | 195 | { |
b71d1d42 ED |
196 | const struct in6_addr *remote = &p->raddr; |
197 | const struct in6_addr *local = &p->laddr; | |
95c96174 | 198 | unsigned int h = 0; |
1da177e4 LT |
199 | int prio = 0; |
200 | ||
201 | if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) { | |
202 | prio = 1; | |
ddbe5032 | 203 | h = HASH(remote, local); |
1da177e4 | 204 | } |
3e6c9fb5 | 205 | return &ip6n->tnls[prio][h]; |
1da177e4 LT |
206 | } |
207 | ||
208 | /** | |
3144581c | 209 | * ip6_tnl_link - add tunnel to hash table |
1da177e4 LT |
210 | * @t: tunnel to be added |
211 | **/ | |
212 | ||
213 | static void | |
2dd02c89 | 214 | ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
1da177e4 | 215 | { |
94767632 | 216 | struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms); |
1da177e4 | 217 | |
8d79266b AS |
218 | if (t->parms.collect_md) |
219 | rcu_assign_pointer(ip6n->collect_md_tun, t); | |
cf778b00 ED |
220 | rcu_assign_pointer(t->next , rtnl_dereference(*tp)); |
221 | rcu_assign_pointer(*tp, t); | |
1da177e4 LT |
222 | } |
223 | ||
224 | /** | |
3144581c | 225 | * ip6_tnl_unlink - remove tunnel from hash table |
1da177e4 LT |
226 | * @t: tunnel to be removed |
227 | **/ | |
228 | ||
229 | static void | |
2dd02c89 | 230 | ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
1da177e4 | 231 | { |
94767632 ED |
232 | struct ip6_tnl __rcu **tp; |
233 | struct ip6_tnl *iter; | |
234 | ||
8d79266b AS |
235 | if (t->parms.collect_md) |
236 | rcu_assign_pointer(ip6n->collect_md_tun, NULL); | |
237 | ||
94767632 ED |
238 | for (tp = ip6_tnl_bucket(ip6n, &t->parms); |
239 | (iter = rtnl_dereference(*tp)) != NULL; | |
240 | tp = &iter->next) { | |
241 | if (t == iter) { | |
cf778b00 | 242 | rcu_assign_pointer(*tp, t->next); |
1da177e4 LT |
243 | break; |
244 | } | |
245 | } | |
246 | } | |
247 | ||
8560f226 ED |
248 | static void ip6_dev_free(struct net_device *dev) |
249 | { | |
cdf3464e MKL |
250 | struct ip6_tnl *t = netdev_priv(dev); |
251 | ||
0d3c703a | 252 | gro_cells_destroy(&t->gro_cells); |
607f725f | 253 | dst_cache_destroy(&t->dst_cache); |
8560f226 ED |
254 | free_percpu(dev->tstats); |
255 | free_netdev(dev); | |
256 | } | |
257 | ||
0b112457 ND |
258 | static int ip6_tnl_create2(struct net_device *dev) |
259 | { | |
260 | struct ip6_tnl *t = netdev_priv(dev); | |
261 | struct net *net = dev_net(dev); | |
262 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
263 | int err; | |
264 | ||
265 | t = netdev_priv(dev); | |
0b112457 | 266 | |
b6ee376c | 267 | dev->rtnl_link_ops = &ip6_link_ops; |
0b112457 ND |
268 | err = register_netdevice(dev); |
269 | if (err < 0) | |
270 | goto out; | |
271 | ||
272 | strcpy(t->parms.name, dev->name); | |
0b112457 ND |
273 | |
274 | dev_hold(dev); | |
275 | ip6_tnl_link(ip6n, t); | |
276 | return 0; | |
277 | ||
278 | out: | |
279 | return err; | |
280 | } | |
281 | ||
1da177e4 | 282 | /** |
2c53040f | 283 | * ip6_tnl_create - create a new tunnel |
1da177e4 LT |
284 | * @p: tunnel parameters |
285 | * @pt: pointer to new tunnel | |
286 | * | |
287 | * Description: | |
288 | * Create tunnel matching given parameters. | |
1ab1457c YH |
289 | * |
290 | * Return: | |
37355565 | 291 | * created tunnel or error pointer |
1da177e4 LT |
292 | **/ |
293 | ||
c12b395a | 294 | static struct ip6_tnl *ip6_tnl_create(struct net *net, struct __ip6_tnl_parm *p) |
1da177e4 LT |
295 | { |
296 | struct net_device *dev; | |
297 | struct ip6_tnl *t; | |
298 | char name[IFNAMSIZ]; | |
37355565 | 299 | int err = -ENOMEM; |
1da177e4 | 300 | |
34cc7ba6 | 301 | if (p->name[0]) |
1da177e4 | 302 | strlcpy(name, p->name, IFNAMSIZ); |
34cc7ba6 PE |
303 | else |
304 | sprintf(name, "ip6tnl%%d"); | |
305 | ||
c835a677 TG |
306 | dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, |
307 | ip6_tnl_dev_setup); | |
63159f29 | 308 | if (!dev) |
567131a7 | 309 | goto failed; |
1da177e4 | 310 | |
554eb277 PE |
311 | dev_net_set(dev, net); |
312 | ||
2941a486 | 313 | t = netdev_priv(dev); |
1da177e4 | 314 | t->parms = *p; |
0bd87628 | 315 | t->net = dev_net(dev); |
0b112457 | 316 | err = ip6_tnl_create2(dev); |
8560f226 ED |
317 | if (err < 0) |
318 | goto failed_free; | |
1da177e4 | 319 | |
567131a7 | 320 | return t; |
b37d428b PE |
321 | |
322 | failed_free: | |
8560f226 | 323 | ip6_dev_free(dev); |
567131a7 | 324 | failed: |
37355565 | 325 | return ERR_PTR(err); |
1da177e4 LT |
326 | } |
327 | ||
328 | /** | |
3144581c | 329 | * ip6_tnl_locate - find or create tunnel matching given parameters |
1ab1457c | 330 | * @p: tunnel parameters |
1da177e4 LT |
331 | * @create: != 0 if allowed to create new tunnel if no match found |
332 | * | |
333 | * Description: | |
3144581c | 334 | * ip6_tnl_locate() first tries to locate an existing tunnel |
1da177e4 LT |
335 | * based on @parms. If this is unsuccessful, but @create is set a new |
336 | * tunnel device is created and registered for use. | |
337 | * | |
338 | * Return: | |
37355565 | 339 | * matching tunnel or error pointer |
1da177e4 LT |
340 | **/ |
341 | ||
2dd02c89 | 342 | static struct ip6_tnl *ip6_tnl_locate(struct net *net, |
c12b395a | 343 | struct __ip6_tnl_parm *p, int create) |
1da177e4 | 344 | { |
b71d1d42 ED |
345 | const struct in6_addr *remote = &p->raddr; |
346 | const struct in6_addr *local = &p->laddr; | |
94767632 | 347 | struct ip6_tnl __rcu **tp; |
1da177e4 | 348 | struct ip6_tnl *t; |
2dd02c89 | 349 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4 | 350 | |
94767632 ED |
351 | for (tp = ip6_tnl_bucket(ip6n, p); |
352 | (t = rtnl_dereference(*tp)) != NULL; | |
353 | tp = &t->next) { | |
1da177e4 | 354 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
2b0bb01b SK |
355 | ipv6_addr_equal(remote, &t->parms.raddr)) { |
356 | if (create) | |
37355565 | 357 | return ERR_PTR(-EEXIST); |
2b0bb01b | 358 | |
567131a7 | 359 | return t; |
2b0bb01b | 360 | } |
1da177e4 LT |
361 | } |
362 | if (!create) | |
37355565 | 363 | return ERR_PTR(-ENODEV); |
2dd02c89 | 364 | return ip6_tnl_create(net, p); |
1da177e4 LT |
365 | } |
366 | ||
367 | /** | |
3144581c | 368 | * ip6_tnl_dev_uninit - tunnel device uninitializer |
1da177e4 | 369 | * @dev: the device to be destroyed |
1ab1457c | 370 | * |
1da177e4 | 371 | * Description: |
3144581c | 372 | * ip6_tnl_dev_uninit() removes tunnel from its list |
1da177e4 LT |
373 | **/ |
374 | ||
375 | static void | |
3144581c | 376 | ip6_tnl_dev_uninit(struct net_device *dev) |
1da177e4 | 377 | { |
2941a486 | 378 | struct ip6_tnl *t = netdev_priv(dev); |
0bd87628 | 379 | struct net *net = t->net; |
2dd02c89 | 380 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4 | 381 | |
94767632 | 382 | if (dev == ip6n->fb_tnl_dev) |
a9b3cd7f | 383 | RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL); |
94767632 | 384 | else |
2dd02c89 | 385 | ip6_tnl_unlink(ip6n, t); |
607f725f | 386 | dst_cache_reset(&t->dst_cache); |
1da177e4 LT |
387 | dev_put(dev); |
388 | } | |
389 | ||
390 | /** | |
391 | * parse_tvl_tnl_enc_lim - handle encapsulation limit option | |
392 | * @skb: received socket buffer | |
393 | * | |
1ab1457c YH |
394 | * Return: |
395 | * 0 if none was found, | |
1da177e4 LT |
396 | * else index to encapsulation limit |
397 | **/ | |
398 | ||
c12b395a | 399 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw) |
1da177e4 | 400 | { |
b71d1d42 | 401 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) raw; |
1da177e4 | 402 | __u8 nexthdr = ipv6h->nexthdr; |
67ba4152 | 403 | __u16 off = sizeof(*ipv6h); |
1da177e4 LT |
404 | |
405 | while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) { | |
406 | __u16 optlen = 0; | |
407 | struct ipv6_opt_hdr *hdr; | |
67ba4152 | 408 | if (raw + off + sizeof(*hdr) > skb->data && |
1da177e4 LT |
409 | !pskb_may_pull(skb, raw - skb->data + off + sizeof (*hdr))) |
410 | break; | |
411 | ||
412 | hdr = (struct ipv6_opt_hdr *) (raw + off); | |
413 | if (nexthdr == NEXTHDR_FRAGMENT) { | |
414 | struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr; | |
415 | if (frag_hdr->frag_off) | |
416 | break; | |
417 | optlen = 8; | |
418 | } else if (nexthdr == NEXTHDR_AUTH) { | |
419 | optlen = (hdr->hdrlen + 2) << 2; | |
420 | } else { | |
421 | optlen = ipv6_optlen(hdr); | |
422 | } | |
423 | if (nexthdr == NEXTHDR_DEST) { | |
424 | __u16 i = off + 2; | |
425 | while (1) { | |
426 | struct ipv6_tlv_tnl_enc_lim *tel; | |
427 | ||
428 | /* No more room for encapsulation limit */ | |
429 | if (i + sizeof (*tel) > off + optlen) | |
430 | break; | |
431 | ||
432 | tel = (struct ipv6_tlv_tnl_enc_lim *) &raw[i]; | |
433 | /* return index of option if found and valid */ | |
434 | if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT && | |
435 | tel->length == 1) | |
436 | return i; | |
437 | /* else jump to next option */ | |
438 | if (tel->type) | |
439 | i += tel->length + 2; | |
440 | else | |
441 | i++; | |
442 | } | |
443 | } | |
444 | nexthdr = hdr->nexthdr; | |
445 | off += optlen; | |
446 | } | |
447 | return 0; | |
448 | } | |
c12b395a | 449 | EXPORT_SYMBOL(ip6_tnl_parse_tlv_enc_lim); |
1da177e4 LT |
450 | |
451 | /** | |
e490d1d8 | 452 | * ip6_tnl_err - tunnel error handler |
1da177e4 LT |
453 | * |
454 | * Description: | |
e490d1d8 | 455 | * ip6_tnl_err() should handle errors in the tunnel according |
1da177e4 LT |
456 | * to the specifications in RFC 2473. |
457 | **/ | |
458 | ||
d2acc347 | 459 | static int |
502b0935 | 460 | ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, |
d5fdd6ba | 461 | u8 *type, u8 *code, int *msg, __u32 *info, int offset) |
1da177e4 | 462 | { |
b71d1d42 | 463 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) skb->data; |
1da177e4 LT |
464 | struct ip6_tnl *t; |
465 | int rel_msg = 0; | |
d5fdd6ba BH |
466 | u8 rel_type = ICMPV6_DEST_UNREACH; |
467 | u8 rel_code = ICMPV6_ADDR_UNREACH; | |
acf722f7 | 468 | u8 tproto; |
1da177e4 LT |
469 | __u32 rel_info = 0; |
470 | __u16 len; | |
d2acc347 | 471 | int err = -ENOENT; |
1da177e4 | 472 | |
1ab1457c YH |
473 | /* If the packet doesn't contain the original IPv6 header we are |
474 | in trouble since we might need the source address for further | |
1da177e4 LT |
475 | processing of the error. */ |
476 | ||
2922bc8a | 477 | rcu_read_lock(); |
e5d08d71 | 478 | t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->daddr, &ipv6h->saddr); |
63159f29 | 479 | if (!t) |
1da177e4 LT |
480 | goto out; |
481 | ||
acf722f7 AA |
482 | tproto = ACCESS_ONCE(t->parms.proto); |
483 | if (tproto != ipproto && tproto != 0) | |
502b0935 YK |
484 | goto out; |
485 | ||
d2acc347 HX |
486 | err = 0; |
487 | ||
e490d1d8 | 488 | switch (*type) { |
1da177e4 LT |
489 | __u32 teli; |
490 | struct ipv6_tlv_tnl_enc_lim *tel; | |
491 | __u32 mtu; | |
492 | case ICMPV6_DEST_UNREACH: | |
17a10c92 MB |
493 | net_dbg_ratelimited("%s: Path to destination invalid or inactive!\n", |
494 | t->parms.name); | |
1da177e4 LT |
495 | rel_msg = 1; |
496 | break; | |
497 | case ICMPV6_TIME_EXCEED: | |
e490d1d8 | 498 | if ((*code) == ICMPV6_EXC_HOPLIMIT) { |
17a10c92 MB |
499 | net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n", |
500 | t->parms.name); | |
1da177e4 LT |
501 | rel_msg = 1; |
502 | } | |
503 | break; | |
504 | case ICMPV6_PARAMPROB: | |
107a5fe6 | 505 | teli = 0; |
e490d1d8 | 506 | if ((*code) == ICMPV6_HDR_FIELD) |
c12b395a | 507 | teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data); |
1da177e4 | 508 | |
704eae1f | 509 | if (teli && teli == *info - 2) { |
1da177e4 LT |
510 | tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; |
511 | if (tel->encap_limit == 0) { | |
17a10c92 MB |
512 | net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n", |
513 | t->parms.name); | |
1da177e4 LT |
514 | rel_msg = 1; |
515 | } | |
e87cc472 | 516 | } else { |
17a10c92 MB |
517 | net_dbg_ratelimited("%s: Recipient unable to parse tunneled packet!\n", |
518 | t->parms.name); | |
1da177e4 LT |
519 | } |
520 | break; | |
521 | case ICMPV6_PKT_TOOBIG: | |
704eae1f | 522 | mtu = *info - offset; |
1da177e4 LT |
523 | if (mtu < IPV6_MIN_MTU) |
524 | mtu = IPV6_MIN_MTU; | |
525 | t->dev->mtu = mtu; | |
526 | ||
e5d08d71 IM |
527 | len = sizeof(*ipv6h) + ntohs(ipv6h->payload_len); |
528 | if (len > mtu) { | |
1da177e4 LT |
529 | rel_type = ICMPV6_PKT_TOOBIG; |
530 | rel_code = 0; | |
531 | rel_info = mtu; | |
532 | rel_msg = 1; | |
533 | } | |
534 | break; | |
535 | } | |
e490d1d8 YK |
536 | |
537 | *type = rel_type; | |
538 | *code = rel_code; | |
539 | *info = rel_info; | |
540 | *msg = rel_msg; | |
541 | ||
542 | out: | |
2922bc8a | 543 | rcu_read_unlock(); |
e490d1d8 YK |
544 | return err; |
545 | } | |
546 | ||
c4d3efaf YK |
547 | static int |
548 | ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 549 | u8 type, u8 code, int offset, __be32 info) |
c4d3efaf YK |
550 | { |
551 | int rel_msg = 0; | |
d5fdd6ba BH |
552 | u8 rel_type = type; |
553 | u8 rel_code = code; | |
704eae1f | 554 | __u32 rel_info = ntohl(info); |
c4d3efaf YK |
555 | int err; |
556 | struct sk_buff *skb2; | |
b71d1d42 | 557 | const struct iphdr *eiph; |
c4d3efaf | 558 | struct rtable *rt; |
31e4543d | 559 | struct flowi4 fl4; |
c4d3efaf | 560 | |
502b0935 YK |
561 | err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code, |
562 | &rel_msg, &rel_info, offset); | |
c4d3efaf YK |
563 | if (err < 0) |
564 | return err; | |
565 | ||
566 | if (rel_msg == 0) | |
567 | return 0; | |
568 | ||
569 | switch (rel_type) { | |
570 | case ICMPV6_DEST_UNREACH: | |
571 | if (rel_code != ICMPV6_ADDR_UNREACH) | |
572 | return 0; | |
573 | rel_type = ICMP_DEST_UNREACH; | |
574 | rel_code = ICMP_HOST_UNREACH; | |
575 | break; | |
576 | case ICMPV6_PKT_TOOBIG: | |
577 | if (rel_code != 0) | |
578 | return 0; | |
579 | rel_type = ICMP_DEST_UNREACH; | |
580 | rel_code = ICMP_FRAG_NEEDED; | |
581 | break; | |
ec18d9a2 DM |
582 | case NDISC_REDIRECT: |
583 | rel_type = ICMP_REDIRECT; | |
584 | rel_code = ICMP_REDIR_HOST; | |
c4d3efaf YK |
585 | default: |
586 | return 0; | |
587 | } | |
588 | ||
589 | if (!pskb_may_pull(skb, offset + sizeof(struct iphdr))) | |
590 | return 0; | |
591 | ||
592 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
593 | if (!skb2) | |
594 | return 0; | |
595 | ||
adf30907 ED |
596 | skb_dst_drop(skb2); |
597 | ||
c4d3efaf | 598 | skb_pull(skb2, offset); |
c1d2bbe1 | 599 | skb_reset_network_header(skb2); |
eddc9ec5 | 600 | eiph = ip_hdr(skb2); |
c4d3efaf YK |
601 | |
602 | /* Try to guess incoming interface */ | |
31e4543d | 603 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
78fbfd8a DM |
604 | eiph->saddr, 0, |
605 | 0, 0, | |
606 | IPPROTO_IPIP, RT_TOS(eiph->tos), 0); | |
b23dd4fe | 607 | if (IS_ERR(rt)) |
c4d3efaf YK |
608 | goto out; |
609 | ||
d8d1f30b | 610 | skb2->dev = rt->dst.dev; |
c4d3efaf YK |
611 | |
612 | /* route "incoming" packet */ | |
613 | if (rt->rt_flags & RTCF_LOCAL) { | |
614 | ip_rt_put(rt); | |
615 | rt = NULL; | |
31e4543d | 616 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
78fbfd8a DM |
617 | eiph->daddr, eiph->saddr, |
618 | 0, 0, | |
619 | IPPROTO_IPIP, | |
620 | RT_TOS(eiph->tos), 0); | |
b23dd4fe | 621 | if (IS_ERR(rt) || |
d8d1f30b | 622 | rt->dst.dev->type != ARPHRD_TUNNEL) { |
b23dd4fe DM |
623 | if (!IS_ERR(rt)) |
624 | ip_rt_put(rt); | |
c4d3efaf YK |
625 | goto out; |
626 | } | |
b23dd4fe | 627 | skb_dst_set(skb2, &rt->dst); |
c4d3efaf YK |
628 | } else { |
629 | ip_rt_put(rt); | |
630 | if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, | |
631 | skb2->dev) || | |
adf30907 | 632 | skb_dst(skb2)->dev->type != ARPHRD_TUNNEL) |
c4d3efaf YK |
633 | goto out; |
634 | } | |
635 | ||
636 | /* change mtu on this route */ | |
637 | if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) { | |
adf30907 | 638 | if (rel_info > dst_mtu(skb_dst(skb2))) |
c4d3efaf YK |
639 | goto out; |
640 | ||
6700c270 | 641 | skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), NULL, skb2, rel_info); |
c4d3efaf | 642 | } |
1ed5c48f | 643 | if (rel_type == ICMP_REDIRECT) |
6700c270 | 644 | skb_dst(skb2)->ops->redirect(skb_dst(skb2), NULL, skb2); |
c4d3efaf | 645 | |
704eae1f | 646 | icmp_send(skb2, rel_type, rel_code, htonl(rel_info)); |
c4d3efaf YK |
647 | |
648 | out: | |
649 | kfree_skb(skb2); | |
650 | return 0; | |
651 | } | |
652 | ||
e490d1d8 YK |
653 | static int |
654 | ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 655 | u8 type, u8 code, int offset, __be32 info) |
e490d1d8 YK |
656 | { |
657 | int rel_msg = 0; | |
d5fdd6ba BH |
658 | u8 rel_type = type; |
659 | u8 rel_code = code; | |
704eae1f | 660 | __u32 rel_info = ntohl(info); |
e490d1d8 YK |
661 | int err; |
662 | ||
502b0935 YK |
663 | err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code, |
664 | &rel_msg, &rel_info, offset); | |
e490d1d8 YK |
665 | if (err < 0) |
666 | return err; | |
667 | ||
668 | if (rel_msg && pskb_may_pull(skb, offset + sizeof(struct ipv6hdr))) { | |
1da177e4 LT |
669 | struct rt6_info *rt; |
670 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
305d4b3c | 671 | |
1da177e4 | 672 | if (!skb2) |
e490d1d8 | 673 | return 0; |
1da177e4 | 674 | |
adf30907 | 675 | skb_dst_drop(skb2); |
1da177e4 | 676 | skb_pull(skb2, offset); |
c1d2bbe1 | 677 | skb_reset_network_header(skb2); |
1da177e4 LT |
678 | |
679 | /* Try to guess incoming interface */ | |
2f7f54b7 PE |
680 | rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, |
681 | NULL, 0, 0); | |
1da177e4 | 682 | |
d1918542 DM |
683 | if (rt && rt->dst.dev) |
684 | skb2->dev = rt->dst.dev; | |
1da177e4 | 685 | |
3ffe533c | 686 | icmpv6_send(skb2, rel_type, rel_code, rel_info); |
1da177e4 | 687 | |
94e187c0 | 688 | ip6_rt_put(rt); |
1da177e4 LT |
689 | |
690 | kfree_skb(skb2); | |
691 | } | |
e490d1d8 YK |
692 | |
693 | return 0; | |
1da177e4 LT |
694 | } |
695 | ||
f4e0b4c5 ND |
696 | static int ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
697 | const struct ipv6hdr *ipv6h, | |
698 | struct sk_buff *skb) | |
c4d3efaf YK |
699 | { |
700 | __u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK; | |
701 | ||
702 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) | |
eddc9ec5 | 703 | ipv4_change_dsfield(ip_hdr(skb), INET_ECN_MASK, dsfield); |
c4d3efaf | 704 | |
f4e0b4c5 | 705 | return IP6_ECN_decapsulate(ipv6h, skb); |
c4d3efaf YK |
706 | } |
707 | ||
f4e0b4c5 ND |
708 | static int ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
709 | const struct ipv6hdr *ipv6h, | |
710 | struct sk_buff *skb) | |
1da177e4 | 711 | { |
8359925b | 712 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
29bb43b4 | 713 | ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb)); |
1da177e4 | 714 | |
f4e0b4c5 | 715 | return IP6_ECN_decapsulate(ipv6h, skb); |
1da177e4 | 716 | } |
8359925b | 717 | |
c12b395a | 718 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, |
d0087b29 VN |
719 | const struct in6_addr *laddr, |
720 | const struct in6_addr *raddr) | |
721 | { | |
c12b395a | 722 | struct __ip6_tnl_parm *p = &t->parms; |
d0087b29 VN |
723 | int ltype = ipv6_addr_type(laddr); |
724 | int rtype = ipv6_addr_type(raddr); | |
725 | __u32 flags = 0; | |
726 | ||
727 | if (ltype == IPV6_ADDR_ANY || rtype == IPV6_ADDR_ANY) { | |
728 | flags = IP6_TNL_F_CAP_PER_PACKET; | |
729 | } else if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && | |
730 | rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && | |
731 | !((ltype|rtype) & IPV6_ADDR_LOOPBACK) && | |
732 | (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) { | |
733 | if (ltype&IPV6_ADDR_UNICAST) | |
734 | flags |= IP6_TNL_F_CAP_XMIT; | |
735 | if (rtype&IPV6_ADDR_UNICAST) | |
736 | flags |= IP6_TNL_F_CAP_RCV; | |
737 | } | |
738 | return flags; | |
739 | } | |
c12b395a | 740 | EXPORT_SYMBOL(ip6_tnl_get_cap); |
d0087b29 | 741 | |
f1a28eab | 742 | /* called with rcu_read_lock() */ |
c12b395a | 743 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, |
d0087b29 VN |
744 | const struct in6_addr *laddr, |
745 | const struct in6_addr *raddr) | |
09c6bbf0 | 746 | { |
c12b395a | 747 | struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf0 | 748 | int ret = 0; |
0bd87628 | 749 | struct net *net = t->net; |
09c6bbf0 | 750 | |
d0087b29 VN |
751 | if ((p->flags & IP6_TNL_F_CAP_RCV) || |
752 | ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && | |
753 | (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_RCV))) { | |
1ab1457c | 754 | struct net_device *ldev = NULL; |
09c6bbf0 VN |
755 | |
756 | if (p->link) | |
f1a28eab | 757 | ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf0 | 758 | |
d0087b29 VN |
759 | if ((ipv6_addr_is_multicast(laddr) || |
760 | likely(ipv6_chk_addr(net, laddr, ldev, 0))) && | |
761 | likely(!ipv6_chk_addr(net, raddr, NULL, 0))) | |
09c6bbf0 | 762 | ret = 1; |
09c6bbf0 VN |
763 | } |
764 | return ret; | |
765 | } | |
c12b395a | 766 | EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl); |
1da177e4 | 767 | |
0d3c703a TH |
768 | static int __ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb, |
769 | const struct tnl_ptk_info *tpi, | |
770 | struct metadata_dst *tun_dst, | |
771 | int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, | |
772 | const struct ipv6hdr *ipv6h, | |
773 | struct sk_buff *skb), | |
774 | bool log_ecn_err) | |
1da177e4 | 775 | { |
0d3c703a | 776 | struct pcpu_sw_netstats *tstats; |
b71d1d42 | 777 | const struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
f4e0b4c5 | 778 | int err; |
1da177e4 | 779 | |
0d3c703a TH |
780 | if ((!(tpi->flags & TUNNEL_CSUM) && |
781 | (tunnel->parms.i_flags & TUNNEL_CSUM)) || | |
782 | ((tpi->flags & TUNNEL_CSUM) && | |
783 | !(tunnel->parms.i_flags & TUNNEL_CSUM))) { | |
784 | tunnel->dev->stats.rx_crc_errors++; | |
785 | tunnel->dev->stats.rx_errors++; | |
786 | goto drop; | |
787 | } | |
8560f226 | 788 | |
0d3c703a TH |
789 | if (tunnel->parms.i_flags & TUNNEL_SEQ) { |
790 | if (!(tpi->flags & TUNNEL_SEQ) || | |
791 | (tunnel->i_seqno && | |
792 | (s32)(ntohl(tpi->seq) - tunnel->i_seqno) < 0)) { | |
793 | tunnel->dev->stats.rx_fifo_errors++; | |
794 | tunnel->dev->stats.rx_errors++; | |
795 | goto drop; | |
502b0935 | 796 | } |
0d3c703a TH |
797 | tunnel->i_seqno = ntohl(tpi->seq) + 1; |
798 | } | |
502b0935 | 799 | |
0d3c703a | 800 | skb->protocol = tpi->proto; |
1da177e4 | 801 | |
0d3c703a TH |
802 | /* Warning: All skb pointers will be invalidated! */ |
803 | if (tunnel->dev->type == ARPHRD_ETHER) { | |
804 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
805 | tunnel->dev->stats.rx_length_errors++; | |
806 | tunnel->dev->stats.rx_errors++; | |
807 | goto drop; | |
1da177e4 | 808 | } |
0d3c703a TH |
809 | |
810 | ipv6h = ipv6_hdr(skb); | |
811 | skb->protocol = eth_type_trans(skb, tunnel->dev); | |
812 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
813 | } else { | |
814 | skb->dev = tunnel->dev; | |
815 | } | |
816 | ||
817 | skb_reset_network_header(skb); | |
818 | memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); | |
819 | ||
820 | __skb_tunnel_rx(skb, tunnel->dev, tunnel->net); | |
821 | ||
822 | err = dscp_ecn_decapsulate(tunnel, ipv6h, skb); | |
823 | if (unlikely(err)) { | |
824 | if (log_ecn_err) | |
825 | net_info_ratelimited("non-ECT from %pI6 with DS=%#x\n", | |
826 | &ipv6h->saddr, | |
827 | ipv6_get_dsfield(ipv6h)); | |
828 | if (err > 1) { | |
829 | ++tunnel->dev->stats.rx_frame_errors; | |
830 | ++tunnel->dev->stats.rx_errors; | |
831 | goto drop; | |
f4e0b4c5 | 832 | } |
0d3c703a | 833 | } |
f4e0b4c5 | 834 | |
0d3c703a TH |
835 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
836 | u64_stats_update_begin(&tstats->syncp); | |
837 | tstats->rx_packets++; | |
838 | tstats->rx_bytes += skb->len; | |
839 | u64_stats_update_end(&tstats->syncp); | |
8560f226 | 840 | |
0d3c703a | 841 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev))); |
8990f468 | 842 | |
8d79266b AS |
843 | if (tun_dst) |
844 | skb_dst_set(skb, (struct dst_entry *)tun_dst); | |
845 | ||
0d3c703a TH |
846 | gro_cells_receive(&tunnel->gro_cells, skb); |
847 | return 0; | |
848 | ||
849 | drop: | |
850 | kfree_skb(skb); | |
851 | return 0; | |
852 | } | |
853 | ||
854 | int ip6_tnl_rcv(struct ip6_tnl *t, struct sk_buff *skb, | |
855 | const struct tnl_ptk_info *tpi, | |
856 | struct metadata_dst *tun_dst, | |
857 | bool log_ecn_err) | |
858 | { | |
859 | return __ip6_tnl_rcv(t, skb, tpi, NULL, ip6ip6_dscp_ecn_decapsulate, | |
860 | log_ecn_err); | |
861 | } | |
862 | EXPORT_SYMBOL(ip6_tnl_rcv); | |
863 | ||
864 | static const struct tnl_ptk_info tpi_v6 = { | |
865 | /* no tunnel info required for ipxip6. */ | |
866 | .proto = htons(ETH_P_IPV6), | |
867 | }; | |
868 | ||
869 | static const struct tnl_ptk_info tpi_v4 = { | |
870 | /* no tunnel info required for ipxip6. */ | |
871 | .proto = htons(ETH_P_IP), | |
872 | }; | |
873 | ||
874 | static int ipxip6_rcv(struct sk_buff *skb, u8 ipproto, | |
875 | const struct tnl_ptk_info *tpi, | |
876 | int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, | |
877 | const struct ipv6hdr *ipv6h, | |
878 | struct sk_buff *skb)) | |
879 | { | |
880 | struct ip6_tnl *t; | |
881 | const struct ipv6hdr *ipv6h = ipv6_hdr(skb); | |
8d79266b | 882 | struct metadata_dst *tun_dst = NULL; |
0d3c703a TH |
883 | int ret = -1; |
884 | ||
885 | rcu_read_lock(); | |
886 | t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr, &ipv6h->daddr); | |
887 | ||
888 | if (t) { | |
889 | u8 tproto = ACCESS_ONCE(t->parms.proto); | |
890 | ||
891 | if (tproto != ipproto && tproto != 0) | |
892 | goto drop; | |
893 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
894 | goto drop; | |
895 | if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) | |
896 | goto drop; | |
897 | if (iptunnel_pull_header(skb, 0, tpi->proto, false)) | |
898 | goto drop; | |
8d79266b AS |
899 | if (t->parms.collect_md) { |
900 | tun_dst = ipv6_tun_rx_dst(skb, 0, 0, 0); | |
901 | if (!tun_dst) | |
902 | return 0; | |
903 | } | |
904 | ret = __ip6_tnl_rcv(t, skb, tpi, tun_dst, dscp_ecn_decapsulate, | |
0d3c703a | 905 | log_ecn_error); |
1da177e4 | 906 | } |
0d3c703a | 907 | |
2922bc8a | 908 | rcu_read_unlock(); |
50fba2aa | 909 | |
0d3c703a TH |
910 | return ret; |
911 | ||
912 | drop: | |
913 | rcu_read_unlock(); | |
50fba2aa HX |
914 | kfree_skb(skb); |
915 | return 0; | |
1da177e4 LT |
916 | } |
917 | ||
c4d3efaf YK |
918 | static int ip4ip6_rcv(struct sk_buff *skb) |
919 | { | |
ca4aa976 | 920 | return ipxip6_rcv(skb, IPPROTO_IPIP, &tpi_v4, |
0d3c703a | 921 | ip4ip6_dscp_ecn_decapsulate); |
c4d3efaf YK |
922 | } |
923 | ||
8359925b YK |
924 | static int ip6ip6_rcv(struct sk_buff *skb) |
925 | { | |
0d3c703a TH |
926 | return ipxip6_rcv(skb, IPPROTO_IPV6, &tpi_v6, |
927 | ip6ip6_dscp_ecn_decapsulate); | |
8359925b YK |
928 | } |
929 | ||
6fb32dde VN |
930 | struct ipv6_tel_txoption { |
931 | struct ipv6_txoptions ops; | |
932 | __u8 dst_opt[8]; | |
933 | }; | |
1da177e4 | 934 | |
6fb32dde VN |
935 | static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit) |
936 | { | |
937 | memset(opt, 0, sizeof(struct ipv6_tel_txoption)); | |
1da177e4 | 938 | |
6fb32dde VN |
939 | opt->dst_opt[2] = IPV6_TLV_TNL_ENCAP_LIMIT; |
940 | opt->dst_opt[3] = 1; | |
941 | opt->dst_opt[4] = encap_limit; | |
942 | opt->dst_opt[5] = IPV6_TLV_PADN; | |
943 | opt->dst_opt[6] = 1; | |
1da177e4 | 944 | |
6fb32dde VN |
945 | opt->ops.dst0opt = (struct ipv6_opt_hdr *) opt->dst_opt; |
946 | opt->ops.opt_nflen = 8; | |
1da177e4 LT |
947 | } |
948 | ||
949 | /** | |
3144581c | 950 | * ip6_tnl_addr_conflict - compare packet addresses to tunnel's own |
1da177e4 | 951 | * @t: the outgoing tunnel device |
1ab1457c | 952 | * @hdr: IPv6 header from the incoming packet |
1da177e4 LT |
953 | * |
954 | * Description: | |
1ab1457c | 955 | * Avoid trivial tunneling loop by checking that tunnel exit-point |
1da177e4 LT |
956 | * doesn't match source of incoming packet. |
957 | * | |
1ab1457c | 958 | * Return: |
1da177e4 LT |
959 | * 1 if conflict, |
960 | * 0 else | |
961 | **/ | |
962 | ||
92113bfd | 963 | static inline bool |
b71d1d42 | 964 | ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr) |
1da177e4 LT |
965 | { |
966 | return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); | |
967 | } | |
968 | ||
d5005140 SK |
969 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t, |
970 | const struct in6_addr *laddr, | |
971 | const struct in6_addr *raddr) | |
09c6bbf0 | 972 | { |
c12b395a | 973 | struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf0 | 974 | int ret = 0; |
0bd87628 | 975 | struct net *net = t->net; |
09c6bbf0 | 976 | |
d5005140 SK |
977 | if ((p->flags & IP6_TNL_F_CAP_XMIT) || |
978 | ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && | |
979 | (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_XMIT))) { | |
09c6bbf0 VN |
980 | struct net_device *ldev = NULL; |
981 | ||
f1a28eab | 982 | rcu_read_lock(); |
09c6bbf0 | 983 | if (p->link) |
f1a28eab | 984 | ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf0 | 985 | |
d5005140 | 986 | if (unlikely(!ipv6_chk_addr(net, laddr, ldev, 0))) |
f3213831 JP |
987 | pr_warn("%s xmit: Local address not yet configured!\n", |
988 | p->name); | |
d5005140 SK |
989 | else if (!ipv6_addr_is_multicast(raddr) && |
990 | unlikely(ipv6_chk_addr(net, raddr, NULL, 0))) | |
f3213831 JP |
991 | pr_warn("%s xmit: Routing loop! Remote address found on this node!\n", |
992 | p->name); | |
09c6bbf0 VN |
993 | else |
994 | ret = 1; | |
f1a28eab | 995 | rcu_read_unlock(); |
09c6bbf0 VN |
996 | } |
997 | return ret; | |
998 | } | |
c12b395a | 999 | EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl); |
1000 | ||
1da177e4 | 1001 | /** |
8eb30be0 | 1002 | * ip6_tnl_xmit - encapsulate packet and send |
1da177e4 | 1003 | * @skb: the outgoing socket buffer |
1ab1457c | 1004 | * @dev: the outgoing tunnel device |
61ec2aec | 1005 | * @dsfield: dscp code for outer header |
8eb30be0 | 1006 | * @fl6: flow of tunneled packet |
61ec2aec YK |
1007 | * @encap_limit: encapsulation limit |
1008 | * @pmtu: Path MTU is stored if packet is too big | |
8eb30be0 | 1009 | * @proto: next header value |
1da177e4 LT |
1010 | * |
1011 | * Description: | |
1012 | * Build new header and do some sanity checks on the packet before sending | |
1013 | * it. | |
1014 | * | |
1ab1457c | 1015 | * Return: |
c4d3efaf | 1016 | * 0 on success |
61ec2aec YK |
1017 | * -1 fail |
1018 | * %-EMSGSIZE message too big. return mtu in this case. | |
1da177e4 LT |
1019 | **/ |
1020 | ||
8eb30be0 TH |
1021 | int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, |
1022 | struct flowi6 *fl6, int encap_limit, __u32 *pmtu, | |
1023 | __u8 proto) | |
1da177e4 | 1024 | { |
2941a486 | 1025 | struct ip6_tnl *t = netdev_priv(dev); |
0bd87628 | 1026 | struct net *net = t->net; |
3dca02af | 1027 | struct net_device_stats *stats = &t->dev->stats; |
0660e03f | 1028 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
6fb32dde | 1029 | struct ipv6_tel_txoption opt; |
d24f22f3 | 1030 | struct dst_entry *dst = NULL, *ndst = NULL; |
1da177e4 LT |
1031 | struct net_device *tdev; |
1032 | int mtu; | |
058214a4 TH |
1033 | unsigned int psh_hlen = sizeof(struct ipv6hdr) + t->encap_hlen; |
1034 | unsigned int max_headroom = psh_hlen; | |
8d79266b | 1035 | u8 hop_limit; |
61ec2aec | 1036 | int err = -1; |
1da177e4 | 1037 | |
8d79266b AS |
1038 | if (t->parms.collect_md) { |
1039 | hop_limit = skb_tunnel_info(skb)->key.ttl; | |
1040 | goto route_lookup; | |
1041 | } else { | |
1042 | hop_limit = t->parms.hop_limit; | |
1043 | } | |
1044 | ||
ea3dc960 SK |
1045 | /* NBMA tunnel */ |
1046 | if (ipv6_addr_any(&t->parms.raddr)) { | |
1047 | struct in6_addr *addr6; | |
1048 | struct neighbour *neigh; | |
1049 | int addr_type; | |
1050 | ||
1051 | if (!skb_dst(skb)) | |
1052 | goto tx_err_link_failure; | |
1053 | ||
1054 | neigh = dst_neigh_lookup(skb_dst(skb), | |
1055 | &ipv6_hdr(skb)->daddr); | |
1056 | if (!neigh) | |
1057 | goto tx_err_link_failure; | |
1058 | ||
1059 | addr6 = (struct in6_addr *)&neigh->primary_key; | |
1060 | addr_type = ipv6_addr_type(addr6); | |
1061 | ||
1062 | if (addr_type == IPV6_ADDR_ANY) | |
1063 | addr6 = &ipv6_hdr(skb)->daddr; | |
1064 | ||
1065 | memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); | |
1066 | neigh_release(neigh); | |
1067 | } else if (!fl6->flowi6_mark) | |
607f725f | 1068 | dst = dst_cache_get(&t->dst_cache); |
d5005140 SK |
1069 | |
1070 | if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr)) | |
1071 | goto tx_err_link_failure; | |
1072 | ||
89b02126 | 1073 | if (!dst) { |
8d79266b | 1074 | route_lookup: |
cdf3464e | 1075 | dst = ip6_route_output(net, NULL, fl6); |
1da177e4 | 1076 | |
cdf3464e | 1077 | if (dst->error) |
a57ebc90 | 1078 | goto tx_err_link_failure; |
cdf3464e MKL |
1079 | dst = xfrm_lookup(net, dst, flowi6_to_flowi(fl6), NULL, 0); |
1080 | if (IS_ERR(dst)) { | |
1081 | err = PTR_ERR(dst); | |
1082 | dst = NULL; | |
452edd59 DM |
1083 | goto tx_err_link_failure; |
1084 | } | |
8d79266b AS |
1085 | if (t->parms.collect_md && |
1086 | ipv6_dev_get_saddr(net, ip6_dst_idev(dst)->dev, | |
1087 | &fl6->daddr, 0, &fl6->saddr)) | |
1088 | goto tx_err_link_failure; | |
cdf3464e | 1089 | ndst = dst; |
a57ebc90 | 1090 | } |
1da177e4 LT |
1091 | |
1092 | tdev = dst->dev; | |
1093 | ||
1094 | if (tdev == dev) { | |
1095 | stats->collisions++; | |
e87cc472 JP |
1096 | net_warn_ratelimited("%s: Local routing loop detected!\n", |
1097 | t->parms.name); | |
1da177e4 LT |
1098 | goto tx_err_dst_release; |
1099 | } | |
058214a4 | 1100 | mtu = dst_mtu(dst) - psh_hlen; |
6fb32dde | 1101 | if (encap_limit >= 0) { |
1da177e4 LT |
1102 | max_headroom += 8; |
1103 | mtu -= 8; | |
1104 | } | |
1105 | if (mtu < IPV6_MIN_MTU) | |
1106 | mtu = IPV6_MIN_MTU; | |
8d79266b | 1107 | if (skb_dst(skb) && !t->parms.collect_md) |
6700c270 | 1108 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
8eb30be0 | 1109 | if (skb->len > mtu && !skb_is_gso(skb)) { |
61ec2aec YK |
1110 | *pmtu = mtu; |
1111 | err = -EMSGSIZE; | |
1da177e4 LT |
1112 | goto tx_err_dst_release; |
1113 | } | |
1114 | ||
8eb30be0 TH |
1115 | if (t->err_count > 0) { |
1116 | if (time_before(jiffies, | |
1117 | t->err_time + IP6TUNNEL_ERR_TIMEO)) { | |
1118 | t->err_count--; | |
1119 | ||
1120 | dst_link_failure(skb); | |
1121 | } else { | |
1122 | t->err_count = 0; | |
1123 | } | |
1124 | } | |
1125 | ||
963a88b3 | 1126 | skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev))); |
0bd87628 | 1127 | |
1da177e4 LT |
1128 | /* |
1129 | * Okay, now see if we can stuff it in the buffer as-is. | |
1130 | */ | |
1131 | max_headroom += LL_RESERVED_SPACE(tdev); | |
1ab1457c | 1132 | |
cfbba49d PM |
1133 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
1134 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { | |
1da177e4 | 1135 | struct sk_buff *new_skb; |
1ab1457c | 1136 | |
e5d08d71 IM |
1137 | new_skb = skb_realloc_headroom(skb, max_headroom); |
1138 | if (!new_skb) | |
1da177e4 LT |
1139 | goto tx_err_dst_release; |
1140 | ||
1141 | if (skb->sk) | |
1142 | skb_set_owner_w(new_skb, skb->sk); | |
9ff26449 | 1143 | consume_skb(skb); |
1da177e4 LT |
1144 | skb = new_skb; |
1145 | } | |
cdf3464e | 1146 | |
8d79266b AS |
1147 | if (t->parms.collect_md) { |
1148 | if (t->encap.type != TUNNEL_ENCAP_NONE) | |
1149 | goto tx_err_dst_release; | |
1150 | } else { | |
1151 | if (!fl6->flowi6_mark && ndst) | |
1152 | dst_cache_set_ip6(&t->dst_cache, ndst, &fl6->saddr); | |
1153 | } | |
cdf3464e MKL |
1154 | skb_dst_set(skb, dst); |
1155 | ||
6fb32dde VN |
1156 | if (encap_limit >= 0) { |
1157 | init_tel_txopt(&opt, encap_limit); | |
1158 | ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL); | |
1159 | } | |
3d483058 | 1160 | |
058214a4 TH |
1161 | /* Calculate max headroom for all the headers and adjust |
1162 | * needed_headroom if necessary. | |
1163 | */ | |
8eb30be0 | 1164 | max_headroom = LL_RESERVED_SPACE(dst->dev) + sizeof(struct ipv6hdr) |
058214a4 | 1165 | + dst->header_len + t->hlen; |
8eb30be0 TH |
1166 | if (max_headroom > dev->needed_headroom) |
1167 | dev->needed_headroom = max_headroom; | |
1168 | ||
058214a4 TH |
1169 | err = ip6_tnl_encap(skb, t, &proto, fl6); |
1170 | if (err) | |
1171 | return err; | |
1172 | ||
e2d1bca7 ACM |
1173 | skb_push(skb, sizeof(struct ipv6hdr)); |
1174 | skb_reset_network_header(skb); | |
0660e03f | 1175 | ipv6h = ipv6_hdr(skb); |
cb1ce2ef | 1176 | ip6_flow_hdr(ipv6h, INET_ECN_encapsulate(0, dsfield), |
42240901 | 1177 | ip6_make_flowlabel(net, skb, fl6->flowlabel, true, fl6)); |
8d79266b | 1178 | ipv6h->hop_limit = hop_limit; |
1da177e4 | 1179 | ipv6h->nexthdr = proto; |
4e3fd7a0 AD |
1180 | ipv6h->saddr = fl6->saddr; |
1181 | ipv6h->daddr = fl6->daddr; | |
79b16aad | 1182 | ip6tunnel_xmit(NULL, skb, dev); |
1da177e4 LT |
1183 | return 0; |
1184 | tx_err_link_failure: | |
1185 | stats->tx_carrier_errors++; | |
1186 | dst_link_failure(skb); | |
1187 | tx_err_dst_release: | |
cdf3464e | 1188 | dst_release(dst); |
61ec2aec YK |
1189 | return err; |
1190 | } | |
8eb30be0 | 1191 | EXPORT_SYMBOL(ip6_tnl_xmit); |
61ec2aec | 1192 | |
c4d3efaf YK |
1193 | static inline int |
1194 | ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) | |
1195 | { | |
1196 | struct ip6_tnl *t = netdev_priv(dev); | |
b71d1d42 | 1197 | const struct iphdr *iph = ip_hdr(skb); |
c4d3efaf | 1198 | int encap_limit = -1; |
4c9483b2 | 1199 | struct flowi6 fl6; |
c4d3efaf YK |
1200 | __u8 dsfield; |
1201 | __u32 mtu; | |
acf722f7 | 1202 | u8 tproto; |
c4d3efaf YK |
1203 | int err; |
1204 | ||
5146d1f1 BH |
1205 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
1206 | ||
acf722f7 | 1207 | tproto = ACCESS_ONCE(t->parms.proto); |
d5005140 | 1208 | if (tproto != IPPROTO_IPIP && tproto != 0) |
c4d3efaf YK |
1209 | return -1; |
1210 | ||
8d79266b | 1211 | dsfield = ipv4_get_dsfield(iph); |
c4d3efaf | 1212 | |
8d79266b AS |
1213 | if (t->parms.collect_md) { |
1214 | struct ip_tunnel_info *tun_info; | |
1215 | const struct ip_tunnel_key *key; | |
c4d3efaf | 1216 | |
8d79266b AS |
1217 | tun_info = skb_tunnel_info(skb); |
1218 | if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) || | |
1219 | ip_tunnel_info_af(tun_info) != AF_INET6)) | |
1220 | return -1; | |
1221 | key = &tun_info->key; | |
1222 | memset(&fl6, 0, sizeof(fl6)); | |
1223 | fl6.flowi6_proto = IPPROTO_IPIP; | |
1224 | fl6.daddr = key->u.ipv6.dst; | |
1225 | fl6.flowlabel = key->label; | |
1226 | } else { | |
1227 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1228 | encap_limit = t->parms.encap_limit; | |
c4d3efaf | 1229 | |
8d79266b AS |
1230 | memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); |
1231 | fl6.flowi6_proto = IPPROTO_IPIP; | |
1232 | ||
1233 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) | |
1234 | fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT) | |
1235 | & IPV6_TCLASS_MASK; | |
1236 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) | |
1237 | fl6.flowi6_mark = skb->mark; | |
1238 | } | |
c4d3efaf | 1239 | |
b8921ca8 TH |
1240 | if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6)) |
1241 | return -1; | |
1242 | ||
1243 | skb_set_inner_ipproto(skb, IPPROTO_IPIP); | |
1244 | ||
8eb30be0 TH |
1245 | err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu, |
1246 | IPPROTO_IPIP); | |
c4d3efaf YK |
1247 | if (err != 0) { |
1248 | /* XXX: send ICMP error even if DF is not set. */ | |
1249 | if (err == -EMSGSIZE) | |
1250 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, | |
1251 | htonl(mtu)); | |
1252 | return -1; | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
61ec2aec YK |
1258 | static inline int |
1259 | ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) | |
1260 | { | |
1261 | struct ip6_tnl *t = netdev_priv(dev); | |
0660e03f | 1262 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
61ec2aec YK |
1263 | int encap_limit = -1; |
1264 | __u16 offset; | |
4c9483b2 | 1265 | struct flowi6 fl6; |
61ec2aec YK |
1266 | __u8 dsfield; |
1267 | __u32 mtu; | |
acf722f7 | 1268 | u8 tproto; |
61ec2aec YK |
1269 | int err; |
1270 | ||
acf722f7 AA |
1271 | tproto = ACCESS_ONCE(t->parms.proto); |
1272 | if ((tproto != IPPROTO_IPV6 && tproto != 0) || | |
d5005140 | 1273 | ip6_tnl_addr_conflict(t, ipv6h)) |
61ec2aec YK |
1274 | return -1; |
1275 | ||
8d79266b AS |
1276 | dsfield = ipv6_get_dsfield(ipv6h); |
1277 | ||
1278 | if (t->parms.collect_md) { | |
1279 | struct ip_tunnel_info *tun_info; | |
1280 | const struct ip_tunnel_key *key; | |
1281 | ||
1282 | tun_info = skb_tunnel_info(skb); | |
1283 | if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) || | |
1284 | ip_tunnel_info_af(tun_info) != AF_INET6)) | |
61ec2aec | 1285 | return -1; |
8d79266b AS |
1286 | key = &tun_info->key; |
1287 | memset(&fl6, 0, sizeof(fl6)); | |
1288 | fl6.flowi6_proto = IPPROTO_IPV6; | |
1289 | fl6.daddr = key->u.ipv6.dst; | |
1290 | fl6.flowlabel = key->label; | |
1291 | } else { | |
1292 | offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb)); | |
1293 | if (offset > 0) { | |
1294 | struct ipv6_tlv_tnl_enc_lim *tel; | |
1295 | ||
1296 | tel = (void *)&skb_network_header(skb)[offset]; | |
1297 | if (tel->encap_limit == 0) { | |
1298 | icmpv6_send(skb, ICMPV6_PARAMPROB, | |
1299 | ICMPV6_HDR_FIELD, offset + 2); | |
1300 | return -1; | |
1301 | } | |
1302 | encap_limit = tel->encap_limit - 1; | |
1303 | } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) { | |
1304 | encap_limit = t->parms.encap_limit; | |
61ec2aec | 1305 | } |
61ec2aec | 1306 | |
8d79266b AS |
1307 | memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); |
1308 | fl6.flowi6_proto = IPPROTO_IPV6; | |
61ec2aec | 1309 | |
8d79266b AS |
1310 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) |
1311 | fl6.flowlabel |= (*(__be32 *)ipv6h & IPV6_TCLASS_MASK); | |
1312 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) | |
1313 | fl6.flowlabel |= ip6_flowlabel(ipv6h); | |
1314 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) | |
1315 | fl6.flowi6_mark = skb->mark; | |
1316 | } | |
61ec2aec | 1317 | |
815d22e5 TH |
1318 | if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6)) |
1319 | return -1; | |
1320 | ||
1321 | skb_set_inner_ipproto(skb, IPPROTO_IPV6); | |
1322 | ||
8eb30be0 TH |
1323 | err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu, |
1324 | IPPROTO_IPV6); | |
61ec2aec YK |
1325 | if (err != 0) { |
1326 | if (err == -EMSGSIZE) | |
3ffe533c | 1327 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
61ec2aec YK |
1328 | return -1; |
1329 | } | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
6fef4c0c | 1334 | static netdev_tx_t |
8eb30be0 | 1335 | ip6_tnl_start_xmit(struct sk_buff *skb, struct net_device *dev) |
61ec2aec YK |
1336 | { |
1337 | struct ip6_tnl *t = netdev_priv(dev); | |
3dca02af | 1338 | struct net_device_stats *stats = &t->dev->stats; |
61ec2aec YK |
1339 | int ret; |
1340 | ||
61ec2aec | 1341 | switch (skb->protocol) { |
60678040 | 1342 | case htons(ETH_P_IP): |
c4d3efaf YK |
1343 | ret = ip4ip6_tnl_xmit(skb, dev); |
1344 | break; | |
60678040 | 1345 | case htons(ETH_P_IPV6): |
61ec2aec YK |
1346 | ret = ip6ip6_tnl_xmit(skb, dev); |
1347 | break; | |
1348 | default: | |
1349 | goto tx_err; | |
1350 | } | |
1351 | ||
1352 | if (ret < 0) | |
1353 | goto tx_err; | |
1354 | ||
6ed10654 | 1355 | return NETDEV_TX_OK; |
61ec2aec | 1356 | |
1da177e4 LT |
1357 | tx_err: |
1358 | stats->tx_errors++; | |
1359 | stats->tx_dropped++; | |
1360 | kfree_skb(skb); | |
6ed10654 | 1361 | return NETDEV_TX_OK; |
1da177e4 LT |
1362 | } |
1363 | ||
3144581c | 1364 | static void ip6_tnl_link_config(struct ip6_tnl *t) |
1da177e4 LT |
1365 | { |
1366 | struct net_device *dev = t->dev; | |
c12b395a | 1367 | struct __ip6_tnl_parm *p = &t->parms; |
4c9483b2 | 1368 | struct flowi6 *fl6 = &t->fl.u.ip6; |
058214a4 | 1369 | int t_hlen; |
1da177e4 | 1370 | |
3a6d54c5 JP |
1371 | memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); |
1372 | memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); | |
1da177e4 LT |
1373 | |
1374 | /* Set up flowi template */ | |
4e3fd7a0 AD |
1375 | fl6->saddr = p->laddr; |
1376 | fl6->daddr = p->raddr; | |
4c9483b2 DM |
1377 | fl6->flowi6_oif = p->link; |
1378 | fl6->flowlabel = 0; | |
1da177e4 LT |
1379 | |
1380 | if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS)) | |
4c9483b2 | 1381 | fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo; |
1da177e4 | 1382 | if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL)) |
4c9483b2 | 1383 | fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo; |
1da177e4 | 1384 | |
d0087b29 VN |
1385 | p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET); |
1386 | p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr); | |
1da177e4 LT |
1387 | |
1388 | if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV) | |
1389 | dev->flags |= IFF_POINTOPOINT; | |
1390 | else | |
1391 | dev->flags &= ~IFF_POINTOPOINT; | |
1392 | ||
058214a4 TH |
1393 | t->tun_hlen = 0; |
1394 | t->hlen = t->encap_hlen + t->tun_hlen; | |
1395 | t_hlen = t->hlen + sizeof(struct ipv6hdr); | |
1396 | ||
1da177e4 | 1397 | if (p->flags & IP6_TNL_F_CAP_XMIT) { |
305d4b3c VN |
1398 | int strict = (ipv6_addr_type(&p->raddr) & |
1399 | (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)); | |
1400 | ||
0bd87628 | 1401 | struct rt6_info *rt = rt6_lookup(t->net, |
2f7f54b7 | 1402 | &p->raddr, &p->laddr, |
305d4b3c | 1403 | p->link, strict); |
1da177e4 | 1404 | |
63159f29 | 1405 | if (!rt) |
1da177e4 LT |
1406 | return; |
1407 | ||
d1918542 DM |
1408 | if (rt->dst.dev) { |
1409 | dev->hard_header_len = rt->dst.dev->hard_header_len + | |
058214a4 | 1410 | t_hlen; |
1da177e4 | 1411 | |
058214a4 | 1412 | dev->mtu = rt->dst.dev->mtu - t_hlen; |
381601e5 | 1413 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
67ba4152 | 1414 | dev->mtu -= 8; |
1da177e4 LT |
1415 | |
1416 | if (dev->mtu < IPV6_MIN_MTU) | |
1417 | dev->mtu = IPV6_MIN_MTU; | |
1418 | } | |
94e187c0 | 1419 | ip6_rt_put(rt); |
1da177e4 LT |
1420 | } |
1421 | } | |
1422 | ||
1423 | /** | |
3144581c | 1424 | * ip6_tnl_change - update the tunnel parameters |
1da177e4 LT |
1425 | * @t: tunnel to be changed |
1426 | * @p: tunnel configuration parameters | |
1da177e4 LT |
1427 | * |
1428 | * Description: | |
3144581c | 1429 | * ip6_tnl_change() updates the tunnel parameters |
1da177e4 LT |
1430 | **/ |
1431 | ||
1432 | static int | |
c12b395a | 1433 | ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p) |
1da177e4 | 1434 | { |
4e3fd7a0 AD |
1435 | t->parms.laddr = p->laddr; |
1436 | t->parms.raddr = p->raddr; | |
1da177e4 LT |
1437 | t->parms.flags = p->flags; |
1438 | t->parms.hop_limit = p->hop_limit; | |
1439 | t->parms.encap_limit = p->encap_limit; | |
1440 | t->parms.flowinfo = p->flowinfo; | |
8181b8c1 | 1441 | t->parms.link = p->link; |
502b0935 | 1442 | t->parms.proto = p->proto; |
607f725f | 1443 | dst_cache_reset(&t->dst_cache); |
3144581c | 1444 | ip6_tnl_link_config(t); |
1da177e4 LT |
1445 | return 0; |
1446 | } | |
1447 | ||
0b112457 ND |
1448 | static int ip6_tnl_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p) |
1449 | { | |
0bd87628 | 1450 | struct net *net = t->net; |
0b112457 ND |
1451 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1452 | int err; | |
1453 | ||
1454 | ip6_tnl_unlink(ip6n, t); | |
1455 | synchronize_net(); | |
1456 | err = ip6_tnl_change(t, p); | |
1457 | ip6_tnl_link(ip6n, t); | |
1458 | netdev_state_change(t->dev); | |
1459 | return err; | |
1460 | } | |
1461 | ||
acf722f7 AA |
1462 | static int ip6_tnl0_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p) |
1463 | { | |
1464 | /* for default tnl0 device allow to change only the proto */ | |
1465 | t->parms.proto = p->proto; | |
1466 | netdev_state_change(t->dev); | |
1467 | return 0; | |
1468 | } | |
1469 | ||
c12b395a | 1470 | static void |
1471 | ip6_tnl_parm_from_user(struct __ip6_tnl_parm *p, const struct ip6_tnl_parm *u) | |
1472 | { | |
1473 | p->laddr = u->laddr; | |
1474 | p->raddr = u->raddr; | |
1475 | p->flags = u->flags; | |
1476 | p->hop_limit = u->hop_limit; | |
1477 | p->encap_limit = u->encap_limit; | |
1478 | p->flowinfo = u->flowinfo; | |
1479 | p->link = u->link; | |
1480 | p->proto = u->proto; | |
1481 | memcpy(p->name, u->name, sizeof(u->name)); | |
1482 | } | |
1483 | ||
1484 | static void | |
1485 | ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p) | |
1486 | { | |
1487 | u->laddr = p->laddr; | |
1488 | u->raddr = p->raddr; | |
1489 | u->flags = p->flags; | |
1490 | u->hop_limit = p->hop_limit; | |
1491 | u->encap_limit = p->encap_limit; | |
1492 | u->flowinfo = p->flowinfo; | |
1493 | u->link = p->link; | |
1494 | u->proto = p->proto; | |
1495 | memcpy(u->name, p->name, sizeof(u->name)); | |
1496 | } | |
1497 | ||
1da177e4 | 1498 | /** |
3144581c | 1499 | * ip6_tnl_ioctl - configure ipv6 tunnels from userspace |
1da177e4 LT |
1500 | * @dev: virtual device associated with tunnel |
1501 | * @ifr: parameters passed from userspace | |
1502 | * @cmd: command to be performed | |
1503 | * | |
1504 | * Description: | |
3144581c | 1505 | * ip6_tnl_ioctl() is used for managing IPv6 tunnels |
1ab1457c | 1506 | * from userspace. |
1da177e4 LT |
1507 | * |
1508 | * The possible commands are the following: | |
1509 | * %SIOCGETTUNNEL: get tunnel parameters for device | |
1510 | * %SIOCADDTUNNEL: add tunnel matching given tunnel parameters | |
1511 | * %SIOCCHGTUNNEL: change tunnel parameters to those given | |
1512 | * %SIOCDELTUNNEL: delete tunnel | |
1513 | * | |
1ab1457c | 1514 | * The fallback device "ip6tnl0", created during module |
1da177e4 LT |
1515 | * initialization, can be used for creating other tunnel devices. |
1516 | * | |
1517 | * Return: | |
1518 | * 0 on success, | |
1519 | * %-EFAULT if unable to copy data to or from userspace, | |
1520 | * %-EPERM if current process hasn't %CAP_NET_ADMIN set | |
1521 | * %-EINVAL if passed tunnel parameters are invalid, | |
1522 | * %-EEXIST if changing a tunnel's parameters would cause a conflict | |
1523 | * %-ENODEV if attempting to change or delete a nonexisting device | |
1524 | **/ | |
1525 | ||
1526 | static int | |
3144581c | 1527 | ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 LT |
1528 | { |
1529 | int err = 0; | |
1da177e4 | 1530 | struct ip6_tnl_parm p; |
c12b395a | 1531 | struct __ip6_tnl_parm p1; |
74462f0d ND |
1532 | struct ip6_tnl *t = netdev_priv(dev); |
1533 | struct net *net = t->net; | |
2dd02c89 | 1534 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4 | 1535 | |
0d3c703a TH |
1536 | memset(&p1, 0, sizeof(p1)); |
1537 | ||
1da177e4 LT |
1538 | switch (cmd) { |
1539 | case SIOCGETTUNNEL: | |
15820e12 | 1540 | if (dev == ip6n->fb_tnl_dev) { |
67ba4152 | 1541 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
1da177e4 LT |
1542 | err = -EFAULT; |
1543 | break; | |
1544 | } | |
c12b395a | 1545 | ip6_tnl_parm_from_user(&p1, &p); |
1546 | t = ip6_tnl_locate(net, &p1, 0); | |
37355565 | 1547 | if (IS_ERR(t)) |
74462f0d | 1548 | t = netdev_priv(dev); |
5ef5d6c5 DC |
1549 | } else { |
1550 | memset(&p, 0, sizeof(p)); | |
567131a7 | 1551 | } |
c12b395a | 1552 | ip6_tnl_parm_to_user(&p, &t->parms); |
67ba4152 | 1553 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) { |
1da177e4 LT |
1554 | err = -EFAULT; |
1555 | } | |
1556 | break; | |
1557 | case SIOCADDTUNNEL: | |
1558 | case SIOCCHGTUNNEL: | |
1559 | err = -EPERM; | |
af31f412 | 1560 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 1561 | break; |
567131a7 | 1562 | err = -EFAULT; |
67ba4152 | 1563 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
1da177e4 | 1564 | break; |
567131a7 | 1565 | err = -EINVAL; |
502b0935 YK |
1566 | if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP && |
1567 | p.proto != 0) | |
1da177e4 | 1568 | break; |
c12b395a | 1569 | ip6_tnl_parm_from_user(&p1, &p); |
1570 | t = ip6_tnl_locate(net, &p1, cmd == SIOCADDTUNNEL); | |
acf722f7 | 1571 | if (cmd == SIOCCHGTUNNEL) { |
37355565 | 1572 | if (!IS_ERR(t)) { |
567131a7 VN |
1573 | if (t->dev != dev) { |
1574 | err = -EEXIST; | |
1575 | break; | |
1576 | } | |
1577 | } else | |
1578 | t = netdev_priv(dev); | |
acf722f7 AA |
1579 | if (dev == ip6n->fb_tnl_dev) |
1580 | err = ip6_tnl0_update(t, &p1); | |
1581 | else | |
1582 | err = ip6_tnl_update(t, &p1); | |
1da177e4 | 1583 | } |
37355565 | 1584 | if (!IS_ERR(t)) { |
1da177e4 | 1585 | err = 0; |
c12b395a | 1586 | ip6_tnl_parm_to_user(&p, &t->parms); |
1587 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) | |
567131a7 VN |
1588 | err = -EFAULT; |
1589 | ||
37355565 ND |
1590 | } else { |
1591 | err = PTR_ERR(t); | |
1592 | } | |
1da177e4 LT |
1593 | break; |
1594 | case SIOCDELTUNNEL: | |
1595 | err = -EPERM; | |
af31f412 | 1596 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1597 | break; |
1598 | ||
15820e12 | 1599 | if (dev == ip6n->fb_tnl_dev) { |
567131a7 | 1600 | err = -EFAULT; |
67ba4152 | 1601 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
1da177e4 | 1602 | break; |
567131a7 | 1603 | err = -ENOENT; |
c12b395a | 1604 | ip6_tnl_parm_from_user(&p1, &p); |
1605 | t = ip6_tnl_locate(net, &p1, 0); | |
37355565 | 1606 | if (IS_ERR(t)) |
1da177e4 | 1607 | break; |
567131a7 | 1608 | err = -EPERM; |
15820e12 | 1609 | if (t->dev == ip6n->fb_tnl_dev) |
1da177e4 | 1610 | break; |
567131a7 | 1611 | dev = t->dev; |
1da177e4 | 1612 | } |
22f8cde5 SH |
1613 | err = 0; |
1614 | unregister_netdevice(dev); | |
1da177e4 LT |
1615 | break; |
1616 | default: | |
1617 | err = -EINVAL; | |
1618 | } | |
1619 | return err; | |
1620 | } | |
1621 | ||
1da177e4 | 1622 | /** |
3144581c | 1623 | * ip6_tnl_change_mtu - change mtu manually for tunnel device |
1da177e4 LT |
1624 | * @dev: virtual device associated with tunnel |
1625 | * @new_mtu: the new mtu | |
1626 | * | |
1627 | * Return: | |
1628 | * 0 on success, | |
1629 | * %-EINVAL if mtu too small | |
1630 | **/ | |
1631 | ||
79ecb90e | 1632 | int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 | 1633 | { |
582442d6 OG |
1634 | struct ip6_tnl *tnl = netdev_priv(dev); |
1635 | ||
1636 | if (tnl->parms.proto == IPPROTO_IPIP) { | |
1637 | if (new_mtu < 68) | |
1638 | return -EINVAL; | |
1639 | } else { | |
1640 | if (new_mtu < IPV6_MIN_MTU) | |
1641 | return -EINVAL; | |
1da177e4 | 1642 | } |
582442d6 OG |
1643 | if (new_mtu > 0xFFF8 - dev->hard_header_len) |
1644 | return -EINVAL; | |
1da177e4 LT |
1645 | dev->mtu = new_mtu; |
1646 | return 0; | |
1647 | } | |
79ecb90e | 1648 | EXPORT_SYMBOL(ip6_tnl_change_mtu); |
1da177e4 | 1649 | |
ecf2c06a ND |
1650 | int ip6_tnl_get_iflink(const struct net_device *dev) |
1651 | { | |
1652 | struct ip6_tnl *t = netdev_priv(dev); | |
1653 | ||
1654 | return t->parms.link; | |
1655 | } | |
1656 | EXPORT_SYMBOL(ip6_tnl_get_iflink); | |
1326c3d5 | 1657 | |
058214a4 TH |
1658 | int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops, |
1659 | unsigned int num) | |
1660 | { | |
1661 | if (num >= MAX_IPTUN_ENCAP_OPS) | |
1662 | return -ERANGE; | |
1663 | ||
1664 | return !cmpxchg((const struct ip6_tnl_encap_ops **) | |
1665 | &ip6tun_encaps[num], | |
1666 | NULL, ops) ? 0 : -1; | |
1667 | } | |
1668 | EXPORT_SYMBOL(ip6_tnl_encap_add_ops); | |
1669 | ||
1670 | int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops, | |
1671 | unsigned int num) | |
1672 | { | |
1673 | int ret; | |
1674 | ||
1675 | if (num >= MAX_IPTUN_ENCAP_OPS) | |
1676 | return -ERANGE; | |
1677 | ||
1678 | ret = (cmpxchg((const struct ip6_tnl_encap_ops **) | |
1679 | &ip6tun_encaps[num], | |
1680 | ops, NULL) == ops) ? 0 : -1; | |
1681 | ||
1682 | synchronize_net(); | |
1683 | ||
1684 | return ret; | |
1685 | } | |
1686 | EXPORT_SYMBOL(ip6_tnl_encap_del_ops); | |
1687 | ||
1688 | int ip6_tnl_encap_setup(struct ip6_tnl *t, | |
1689 | struct ip_tunnel_encap *ipencap) | |
1690 | { | |
1691 | int hlen; | |
1692 | ||
1693 | memset(&t->encap, 0, sizeof(t->encap)); | |
1694 | ||
1695 | hlen = ip6_encap_hlen(ipencap); | |
1696 | if (hlen < 0) | |
1697 | return hlen; | |
1698 | ||
1699 | t->encap.type = ipencap->type; | |
1700 | t->encap.sport = ipencap->sport; | |
1701 | t->encap.dport = ipencap->dport; | |
1702 | t->encap.flags = ipencap->flags; | |
1703 | ||
1704 | t->encap_hlen = hlen; | |
1705 | t->hlen = t->encap_hlen + t->tun_hlen; | |
1706 | ||
1707 | return 0; | |
1708 | } | |
1709 | EXPORT_SYMBOL_GPL(ip6_tnl_encap_setup); | |
1710 | ||
1326c3d5 | 1711 | static const struct net_device_ops ip6_tnl_netdev_ops = { |
6c6151da | 1712 | .ndo_init = ip6_tnl_dev_init, |
8560f226 | 1713 | .ndo_uninit = ip6_tnl_dev_uninit, |
8eb30be0 | 1714 | .ndo_start_xmit = ip6_tnl_start_xmit, |
8560f226 | 1715 | .ndo_do_ioctl = ip6_tnl_ioctl, |
1326c3d5 | 1716 | .ndo_change_mtu = ip6_tnl_change_mtu, |
8560f226 | 1717 | .ndo_get_stats = ip6_get_stats, |
ecf2c06a | 1718 | .ndo_get_iflink = ip6_tnl_get_iflink, |
1326c3d5 SH |
1719 | }; |
1720 | ||
51c052d4 TH |
1721 | #define IPXIPX_FEATURES (NETIF_F_SG | \ |
1722 | NETIF_F_FRAGLIST | \ | |
1723 | NETIF_F_HIGHDMA | \ | |
1724 | NETIF_F_GSO_SOFTWARE | \ | |
1725 | NETIF_F_HW_CSUM) | |
8560f226 | 1726 | |
1da177e4 | 1727 | /** |
3144581c | 1728 | * ip6_tnl_dev_setup - setup virtual tunnel device |
1da177e4 LT |
1729 | * @dev: virtual device associated with tunnel |
1730 | * | |
1731 | * Description: | |
1732 | * Initialize function pointers and device parameters | |
1733 | **/ | |
1734 | ||
3144581c | 1735 | static void ip6_tnl_dev_setup(struct net_device *dev) |
1da177e4 | 1736 | { |
1326c3d5 | 1737 | dev->netdev_ops = &ip6_tnl_netdev_ops; |
8560f226 | 1738 | dev->destructor = ip6_dev_free; |
1da177e4 LT |
1739 | |
1740 | dev->type = ARPHRD_TUNNEL6; | |
1da177e4 LT |
1741 | dev->flags |= IFF_NOARP; |
1742 | dev->addr_len = sizeof(struct in6_addr); | |
058214a4 | 1743 | dev->features |= NETIF_F_LLTX; |
02875878 | 1744 | netif_keep_dst(dev); |
51c052d4 TH |
1745 | |
1746 | dev->features |= IPXIPX_FEATURES; | |
1747 | dev->hw_features |= IPXIPX_FEATURES; | |
1748 | ||
e837735e ND |
1749 | /* This perm addr will be used as interface identifier by IPv6 */ |
1750 | dev->addr_assign_type = NET_ADDR_RANDOM; | |
1751 | eth_random_addr(dev->perm_addr); | |
1da177e4 LT |
1752 | } |
1753 | ||
1754 | ||
1755 | /** | |
3144581c | 1756 | * ip6_tnl_dev_init_gen - general initializer for all tunnel devices |
1da177e4 LT |
1757 | * @dev: virtual device associated with tunnel |
1758 | **/ | |
1759 | ||
8560f226 | 1760 | static inline int |
3144581c | 1761 | ip6_tnl_dev_init_gen(struct net_device *dev) |
1da177e4 | 1762 | { |
2941a486 | 1763 | struct ip6_tnl *t = netdev_priv(dev); |
cdf3464e | 1764 | int ret; |
058214a4 | 1765 | int t_hlen; |
8560f226 | 1766 | |
1da177e4 | 1767 | t->dev = dev; |
0bd87628 | 1768 | t->net = dev_net(dev); |
1c213bd2 | 1769 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
8560f226 ED |
1770 | if (!dev->tstats) |
1771 | return -ENOMEM; | |
cdf3464e | 1772 | |
607f725f | 1773 | ret = dst_cache_init(&t->dst_cache, GFP_KERNEL); |
0d3c703a TH |
1774 | if (ret) |
1775 | goto free_stats; | |
1776 | ||
1777 | ret = gro_cells_init(&t->gro_cells, dev); | |
1778 | if (ret) | |
1779 | goto destroy_dst; | |
cdf3464e | 1780 | |
79ecb90e | 1781 | t->tun_hlen = 0; |
058214a4 TH |
1782 | t->hlen = t->encap_hlen + t->tun_hlen; |
1783 | t_hlen = t->hlen + sizeof(struct ipv6hdr); | |
1784 | ||
1785 | dev->type = ARPHRD_TUNNEL6; | |
1786 | dev->hard_header_len = LL_MAX_HEADER + t_hlen; | |
1787 | dev->mtu = ETH_DATA_LEN - t_hlen; | |
1788 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1789 | dev->mtu -= 8; | |
79ecb90e | 1790 | |
8560f226 | 1791 | return 0; |
0d3c703a TH |
1792 | |
1793 | destroy_dst: | |
1794 | dst_cache_destroy(&t->dst_cache); | |
1795 | free_stats: | |
1796 | free_percpu(dev->tstats); | |
1797 | dev->tstats = NULL; | |
1798 | ||
1799 | return ret; | |
1da177e4 LT |
1800 | } |
1801 | ||
1802 | /** | |
3144581c | 1803 | * ip6_tnl_dev_init - initializer for all non fallback tunnel devices |
1da177e4 LT |
1804 | * @dev: virtual device associated with tunnel |
1805 | **/ | |
1806 | ||
8560f226 | 1807 | static int ip6_tnl_dev_init(struct net_device *dev) |
1da177e4 | 1808 | { |
2941a486 | 1809 | struct ip6_tnl *t = netdev_priv(dev); |
8560f226 ED |
1810 | int err = ip6_tnl_dev_init_gen(dev); |
1811 | ||
1812 | if (err) | |
1813 | return err; | |
3144581c | 1814 | ip6_tnl_link_config(t); |
8d79266b AS |
1815 | if (t->parms.collect_md) { |
1816 | dev->features |= NETIF_F_NETNS_LOCAL; | |
1817 | netif_keep_dst(dev); | |
1818 | } | |
8560f226 | 1819 | return 0; |
1da177e4 LT |
1820 | } |
1821 | ||
1822 | /** | |
3144581c | 1823 | * ip6_fb_tnl_dev_init - initializer for fallback tunnel device |
1da177e4 LT |
1824 | * @dev: fallback device |
1825 | * | |
1826 | * Return: 0 | |
1827 | **/ | |
1828 | ||
8560f226 | 1829 | static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev) |
1da177e4 | 1830 | { |
2941a486 | 1831 | struct ip6_tnl *t = netdev_priv(dev); |
3e6c9fb5 PE |
1832 | struct net *net = dev_net(dev); |
1833 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1834 | ||
502b0935 | 1835 | t->parms.proto = IPPROTO_IPV6; |
1da177e4 | 1836 | dev_hold(dev); |
d0087b29 | 1837 | |
cf778b00 | 1838 | rcu_assign_pointer(ip6n->tnls_wc[0], t); |
8560f226 | 1839 | return 0; |
1da177e4 LT |
1840 | } |
1841 | ||
0b112457 ND |
1842 | static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[]) |
1843 | { | |
1844 | u8 proto; | |
1845 | ||
c8965932 | 1846 | if (!data || !data[IFLA_IPTUN_PROTO]) |
0b112457 ND |
1847 | return 0; |
1848 | ||
1849 | proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
1850 | if (proto != IPPROTO_IPV6 && | |
1851 | proto != IPPROTO_IPIP && | |
1852 | proto != 0) | |
1853 | return -EINVAL; | |
1854 | ||
1855 | return 0; | |
1856 | } | |
1857 | ||
1858 | static void ip6_tnl_netlink_parms(struct nlattr *data[], | |
1859 | struct __ip6_tnl_parm *parms) | |
1860 | { | |
1861 | memset(parms, 0, sizeof(*parms)); | |
1862 | ||
1863 | if (!data) | |
1864 | return; | |
1865 | ||
1866 | if (data[IFLA_IPTUN_LINK]) | |
1867 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); | |
1868 | ||
1869 | if (data[IFLA_IPTUN_LOCAL]) | |
67b61f6c | 1870 | parms->laddr = nla_get_in6_addr(data[IFLA_IPTUN_LOCAL]); |
0b112457 ND |
1871 | |
1872 | if (data[IFLA_IPTUN_REMOTE]) | |
67b61f6c | 1873 | parms->raddr = nla_get_in6_addr(data[IFLA_IPTUN_REMOTE]); |
0b112457 ND |
1874 | |
1875 | if (data[IFLA_IPTUN_TTL]) | |
1876 | parms->hop_limit = nla_get_u8(data[IFLA_IPTUN_TTL]); | |
1877 | ||
1878 | if (data[IFLA_IPTUN_ENCAP_LIMIT]) | |
1879 | parms->encap_limit = nla_get_u8(data[IFLA_IPTUN_ENCAP_LIMIT]); | |
1880 | ||
1881 | if (data[IFLA_IPTUN_FLOWINFO]) | |
1ff05fb7 | 1882 | parms->flowinfo = nla_get_be32(data[IFLA_IPTUN_FLOWINFO]); |
0b112457 ND |
1883 | |
1884 | if (data[IFLA_IPTUN_FLAGS]) | |
1885 | parms->flags = nla_get_u32(data[IFLA_IPTUN_FLAGS]); | |
1886 | ||
1887 | if (data[IFLA_IPTUN_PROTO]) | |
1888 | parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
8d79266b AS |
1889 | |
1890 | if (data[IFLA_IPTUN_COLLECT_METADATA]) | |
1891 | parms->collect_md = true; | |
0b112457 ND |
1892 | } |
1893 | ||
b3a27b51 TH |
1894 | static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[], |
1895 | struct ip_tunnel_encap *ipencap) | |
1896 | { | |
1897 | bool ret = false; | |
1898 | ||
1899 | memset(ipencap, 0, sizeof(*ipencap)); | |
1900 | ||
1901 | if (!data) | |
1902 | return ret; | |
1903 | ||
1904 | if (data[IFLA_IPTUN_ENCAP_TYPE]) { | |
1905 | ret = true; | |
1906 | ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]); | |
1907 | } | |
1908 | ||
1909 | if (data[IFLA_IPTUN_ENCAP_FLAGS]) { | |
1910 | ret = true; | |
1911 | ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]); | |
1912 | } | |
1913 | ||
1914 | if (data[IFLA_IPTUN_ENCAP_SPORT]) { | |
1915 | ret = true; | |
1916 | ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]); | |
1917 | } | |
1918 | ||
1919 | if (data[IFLA_IPTUN_ENCAP_DPORT]) { | |
1920 | ret = true; | |
1921 | ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]); | |
1922 | } | |
1923 | ||
1924 | return ret; | |
1925 | } | |
1926 | ||
0b112457 ND |
1927 | static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev, |
1928 | struct nlattr *tb[], struct nlattr *data[]) | |
1929 | { | |
1930 | struct net *net = dev_net(dev); | |
8d79266b | 1931 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
37355565 | 1932 | struct ip6_tnl *nt, *t; |
b3a27b51 | 1933 | struct ip_tunnel_encap ipencap; |
0b112457 ND |
1934 | |
1935 | nt = netdev_priv(dev); | |
b3a27b51 TH |
1936 | |
1937 | if (ip6_tnl_netlink_encap_parms(data, &ipencap)) { | |
1938 | int err = ip6_tnl_encap_setup(nt, &ipencap); | |
1939 | ||
1940 | if (err < 0) | |
1941 | return err; | |
1942 | } | |
1943 | ||
0b112457 ND |
1944 | ip6_tnl_netlink_parms(data, &nt->parms); |
1945 | ||
8d79266b AS |
1946 | if (nt->parms.collect_md) { |
1947 | if (rtnl_dereference(ip6n->collect_md_tun)) | |
1948 | return -EEXIST; | |
1949 | } else { | |
1950 | t = ip6_tnl_locate(net, &nt->parms, 0); | |
1951 | if (!IS_ERR(t)) | |
1952 | return -EEXIST; | |
1953 | } | |
0b112457 ND |
1954 | |
1955 | return ip6_tnl_create2(dev); | |
1956 | } | |
1957 | ||
1958 | static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[], | |
1959 | struct nlattr *data[]) | |
1960 | { | |
0bd87628 | 1961 | struct ip6_tnl *t = netdev_priv(dev); |
0b112457 | 1962 | struct __ip6_tnl_parm p; |
0bd87628 | 1963 | struct net *net = t->net; |
0b112457 | 1964 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
b3a27b51 | 1965 | struct ip_tunnel_encap ipencap; |
0b112457 ND |
1966 | |
1967 | if (dev == ip6n->fb_tnl_dev) | |
1968 | return -EINVAL; | |
1969 | ||
b3a27b51 TH |
1970 | if (ip6_tnl_netlink_encap_parms(data, &ipencap)) { |
1971 | int err = ip6_tnl_encap_setup(t, &ipencap); | |
1972 | ||
1973 | if (err < 0) | |
1974 | return err; | |
1975 | } | |
0b112457 | 1976 | ip6_tnl_netlink_parms(data, &p); |
8d79266b AS |
1977 | if (p.collect_md) |
1978 | return -EINVAL; | |
0b112457 ND |
1979 | |
1980 | t = ip6_tnl_locate(net, &p, 0); | |
37355565 | 1981 | if (!IS_ERR(t)) { |
0b112457 ND |
1982 | if (t->dev != dev) |
1983 | return -EEXIST; | |
1984 | } else | |
1985 | t = netdev_priv(dev); | |
1986 | ||
1987 | return ip6_tnl_update(t, &p); | |
1988 | } | |
1989 | ||
1e9f3d6f ND |
1990 | static void ip6_tnl_dellink(struct net_device *dev, struct list_head *head) |
1991 | { | |
1992 | struct net *net = dev_net(dev); | |
1993 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1994 | ||
1995 | if (dev != ip6n->fb_tnl_dev) | |
1996 | unregister_netdevice_queue(dev, head); | |
1997 | } | |
1998 | ||
b58d731a | 1999 | static size_t ip6_tnl_get_size(const struct net_device *dev) |
c075b130 ND |
2000 | { |
2001 | return | |
2002 | /* IFLA_IPTUN_LINK */ | |
2003 | nla_total_size(4) + | |
2004 | /* IFLA_IPTUN_LOCAL */ | |
2005 | nla_total_size(sizeof(struct in6_addr)) + | |
2006 | /* IFLA_IPTUN_REMOTE */ | |
2007 | nla_total_size(sizeof(struct in6_addr)) + | |
2008 | /* IFLA_IPTUN_TTL */ | |
2009 | nla_total_size(1) + | |
2010 | /* IFLA_IPTUN_ENCAP_LIMIT */ | |
2011 | nla_total_size(1) + | |
2012 | /* IFLA_IPTUN_FLOWINFO */ | |
2013 | nla_total_size(4) + | |
2014 | /* IFLA_IPTUN_FLAGS */ | |
2015 | nla_total_size(4) + | |
cfa323b6 ND |
2016 | /* IFLA_IPTUN_PROTO */ |
2017 | nla_total_size(1) + | |
b3a27b51 TH |
2018 | /* IFLA_IPTUN_ENCAP_TYPE */ |
2019 | nla_total_size(2) + | |
2020 | /* IFLA_IPTUN_ENCAP_FLAGS */ | |
2021 | nla_total_size(2) + | |
2022 | /* IFLA_IPTUN_ENCAP_SPORT */ | |
2023 | nla_total_size(2) + | |
2024 | /* IFLA_IPTUN_ENCAP_DPORT */ | |
2025 | nla_total_size(2) + | |
8d79266b AS |
2026 | /* IFLA_IPTUN_COLLECT_METADATA */ |
2027 | nla_total_size(0) + | |
c075b130 ND |
2028 | 0; |
2029 | } | |
2030 | ||
b58d731a | 2031 | static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev) |
c075b130 ND |
2032 | { |
2033 | struct ip6_tnl *tunnel = netdev_priv(dev); | |
2034 | struct __ip6_tnl_parm *parm = &tunnel->parms; | |
2035 | ||
2036 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || | |
930345ea JB |
2037 | nla_put_in6_addr(skb, IFLA_IPTUN_LOCAL, &parm->laddr) || |
2038 | nla_put_in6_addr(skb, IFLA_IPTUN_REMOTE, &parm->raddr) || | |
c075b130 ND |
2039 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->hop_limit) || |
2040 | nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) || | |
2041 | nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) || | |
cfa323b6 ND |
2042 | nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) || |
2043 | nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto)) | |
c075b130 | 2044 | goto nla_put_failure; |
b3a27b51 | 2045 | |
8d79266b AS |
2046 | if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, tunnel->encap.type) || |
2047 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, tunnel->encap.sport) || | |
2048 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, tunnel->encap.dport) || | |
2049 | nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, tunnel->encap.flags)) | |
b3a27b51 TH |
2050 | goto nla_put_failure; |
2051 | ||
8d79266b AS |
2052 | if (parm->collect_md) |
2053 | if (nla_put_flag(skb, IFLA_IPTUN_COLLECT_METADATA)) | |
2054 | goto nla_put_failure; | |
c075b130 ND |
2055 | return 0; |
2056 | ||
2057 | nla_put_failure: | |
2058 | return -EMSGSIZE; | |
2059 | } | |
2060 | ||
1728d4fa ND |
2061 | struct net *ip6_tnl_get_link_net(const struct net_device *dev) |
2062 | { | |
2063 | struct ip6_tnl *tunnel = netdev_priv(dev); | |
2064 | ||
2065 | return tunnel->net; | |
2066 | } | |
2067 | EXPORT_SYMBOL(ip6_tnl_get_link_net); | |
2068 | ||
0b112457 ND |
2069 | static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = { |
2070 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, | |
2071 | [IFLA_IPTUN_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
2072 | [IFLA_IPTUN_REMOTE] = { .len = sizeof(struct in6_addr) }, | |
2073 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, | |
2074 | [IFLA_IPTUN_ENCAP_LIMIT] = { .type = NLA_U8 }, | |
2075 | [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 }, | |
2076 | [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 }, | |
2077 | [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, | |
b3a27b51 TH |
2078 | [IFLA_IPTUN_ENCAP_TYPE] = { .type = NLA_U16 }, |
2079 | [IFLA_IPTUN_ENCAP_FLAGS] = { .type = NLA_U16 }, | |
2080 | [IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 }, | |
2081 | [IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 }, | |
8d79266b | 2082 | [IFLA_IPTUN_COLLECT_METADATA] = { .type = NLA_FLAG }, |
0b112457 ND |
2083 | }; |
2084 | ||
c075b130 ND |
2085 | static struct rtnl_link_ops ip6_link_ops __read_mostly = { |
2086 | .kind = "ip6tnl", | |
2087 | .maxtype = IFLA_IPTUN_MAX, | |
0b112457 | 2088 | .policy = ip6_tnl_policy, |
c075b130 | 2089 | .priv_size = sizeof(struct ip6_tnl), |
0b112457 ND |
2090 | .setup = ip6_tnl_dev_setup, |
2091 | .validate = ip6_tnl_validate, | |
2092 | .newlink = ip6_tnl_newlink, | |
2093 | .changelink = ip6_tnl_changelink, | |
1e9f3d6f | 2094 | .dellink = ip6_tnl_dellink, |
b58d731a ND |
2095 | .get_size = ip6_tnl_get_size, |
2096 | .fill_info = ip6_tnl_fill_info, | |
1728d4fa | 2097 | .get_link_net = ip6_tnl_get_link_net, |
c075b130 ND |
2098 | }; |
2099 | ||
3ff2cfa5 | 2100 | static struct xfrm6_tunnel ip4ip6_handler __read_mostly = { |
c4d3efaf YK |
2101 | .handler = ip4ip6_rcv, |
2102 | .err_handler = ip4ip6_err, | |
2103 | .priority = 1, | |
2104 | }; | |
2105 | ||
3ff2cfa5 | 2106 | static struct xfrm6_tunnel ip6ip6_handler __read_mostly = { |
0303770d PM |
2107 | .handler = ip6ip6_rcv, |
2108 | .err_handler = ip6ip6_err, | |
d2acc347 | 2109 | .priority = 1, |
1da177e4 LT |
2110 | }; |
2111 | ||
1e9f3d6f | 2112 | static void __net_exit ip6_tnl_destroy_tunnels(struct net *net) |
3e6c9fb5 | 2113 | { |
1e9f3d6f | 2114 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
0bd87628 | 2115 | struct net_device *dev, *aux; |
3e6c9fb5 PE |
2116 | int h; |
2117 | struct ip6_tnl *t; | |
cf4432f5 | 2118 | LIST_HEAD(list); |
3e6c9fb5 | 2119 | |
0bd87628 ND |
2120 | for_each_netdev_safe(net, dev, aux) |
2121 | if (dev->rtnl_link_ops == &ip6_link_ops) | |
2122 | unregister_netdevice_queue(dev, &list); | |
2123 | ||
e87a8f24 | 2124 | for (h = 0; h < IP6_TUNNEL_HASH_SIZE; h++) { |
94767632 | 2125 | t = rtnl_dereference(ip6n->tnls_r_l[h]); |
53b24b8f | 2126 | while (t) { |
0bd87628 ND |
2127 | /* If dev is in the same netns, it has already |
2128 | * been added to the list by the previous loop. | |
2129 | */ | |
2130 | if (!net_eq(dev_net(t->dev), net)) | |
2131 | unregister_netdevice_queue(t->dev, &list); | |
94767632 | 2132 | t = rtnl_dereference(t->next); |
cf4432f5 | 2133 | } |
3e6c9fb5 PE |
2134 | } |
2135 | ||
cf4432f5 | 2136 | unregister_netdevice_many(&list); |
3e6c9fb5 PE |
2137 | } |
2138 | ||
2c8c1e72 | 2139 | static int __net_init ip6_tnl_init_net(struct net *net) |
13eeb8e9 | 2140 | { |
ac31cd3c | 2141 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
731abb9c | 2142 | struct ip6_tnl *t = NULL; |
13eeb8e9 | 2143 | int err; |
13eeb8e9 | 2144 | |
3e6c9fb5 PE |
2145 | ip6n->tnls[0] = ip6n->tnls_wc; |
2146 | ip6n->tnls[1] = ip6n->tnls_r_l; | |
2147 | ||
15820e12 PE |
2148 | err = -ENOMEM; |
2149 | ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0", | |
c835a677 | 2150 | NET_NAME_UNKNOWN, ip6_tnl_dev_setup); |
15820e12 PE |
2151 | |
2152 | if (!ip6n->fb_tnl_dev) | |
2153 | goto err_alloc_dev; | |
be77e593 | 2154 | dev_net_set(ip6n->fb_tnl_dev, net); |
bb814094 | 2155 | ip6n->fb_tnl_dev->rtnl_link_ops = &ip6_link_ops; |
0bd87628 ND |
2156 | /* FB netdevice is special: we have one, and only one per netns. |
2157 | * Allowing to move it to another netns is clearly unsafe. | |
2158 | */ | |
2159 | ip6n->fb_tnl_dev->features |= NETIF_F_NETNS_LOCAL; | |
15820e12 | 2160 | |
8560f226 ED |
2161 | err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev); |
2162 | if (err < 0) | |
2163 | goto err_register; | |
15820e12 PE |
2164 | |
2165 | err = register_netdev(ip6n->fb_tnl_dev); | |
2166 | if (err < 0) | |
2167 | goto err_register; | |
731abb9c JB |
2168 | |
2169 | t = netdev_priv(ip6n->fb_tnl_dev); | |
2170 | ||
2171 | strcpy(t->parms.name, ip6n->fb_tnl_dev->name); | |
13eeb8e9 PE |
2172 | return 0; |
2173 | ||
15820e12 | 2174 | err_register: |
8560f226 | 2175 | ip6_dev_free(ip6n->fb_tnl_dev); |
15820e12 | 2176 | err_alloc_dev: |
13eeb8e9 PE |
2177 | return err; |
2178 | } | |
2179 | ||
2c8c1e72 | 2180 | static void __net_exit ip6_tnl_exit_net(struct net *net) |
13eeb8e9 | 2181 | { |
3e6c9fb5 | 2182 | rtnl_lock(); |
1e9f3d6f | 2183 | ip6_tnl_destroy_tunnels(net); |
3e6c9fb5 | 2184 | rtnl_unlock(); |
13eeb8e9 PE |
2185 | } |
2186 | ||
2187 | static struct pernet_operations ip6_tnl_net_ops = { | |
2188 | .init = ip6_tnl_init_net, | |
2189 | .exit = ip6_tnl_exit_net, | |
ac31cd3c EB |
2190 | .id = &ip6_tnl_net_id, |
2191 | .size = sizeof(struct ip6_tnl_net), | |
13eeb8e9 PE |
2192 | }; |
2193 | ||
1da177e4 LT |
2194 | /** |
2195 | * ip6_tunnel_init - register protocol and reserve needed resources | |
2196 | * | |
2197 | * Return: 0 on success | |
2198 | **/ | |
2199 | ||
2200 | static int __init ip6_tunnel_init(void) | |
2201 | { | |
2202 | int err; | |
2203 | ||
d5aa407f AD |
2204 | err = register_pernet_device(&ip6_tnl_net_ops); |
2205 | if (err < 0) | |
2206 | goto out_pernet; | |
2207 | ||
2208 | err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET); | |
2209 | if (err < 0) { | |
f3213831 | 2210 | pr_err("%s: can't register ip4ip6\n", __func__); |
d5aa407f | 2211 | goto out_ip4ip6; |
c4d3efaf YK |
2212 | } |
2213 | ||
d5aa407f AD |
2214 | err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6); |
2215 | if (err < 0) { | |
f3213831 | 2216 | pr_err("%s: can't register ip6ip6\n", __func__); |
d5aa407f | 2217 | goto out_ip6ip6; |
1da177e4 | 2218 | } |
c075b130 ND |
2219 | err = rtnl_link_register(&ip6_link_ops); |
2220 | if (err < 0) | |
2221 | goto rtnl_link_failed; | |
13eeb8e9 | 2222 | |
1da177e4 | 2223 | return 0; |
d5aa407f | 2224 | |
c075b130 ND |
2225 | rtnl_link_failed: |
2226 | xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6); | |
d5aa407f | 2227 | out_ip6ip6: |
c4d3efaf | 2228 | xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET); |
d5aa407f AD |
2229 | out_ip4ip6: |
2230 | unregister_pernet_device(&ip6_tnl_net_ops); | |
2231 | out_pernet: | |
1da177e4 LT |
2232 | return err; |
2233 | } | |
2234 | ||
2235 | /** | |
2236 | * ip6_tunnel_cleanup - free resources and unregister protocol | |
2237 | **/ | |
2238 | ||
2239 | static void __exit ip6_tunnel_cleanup(void) | |
2240 | { | |
c075b130 | 2241 | rtnl_link_unregister(&ip6_link_ops); |
c4d3efaf | 2242 | if (xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET)) |
f3213831 | 2243 | pr_info("%s: can't deregister ip4ip6\n", __func__); |
c4d3efaf | 2244 | |
73d605d1 | 2245 | if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6)) |
f3213831 | 2246 | pr_info("%s: can't deregister ip6ip6\n", __func__); |
1da177e4 | 2247 | |
ac31cd3c | 2248 | unregister_pernet_device(&ip6_tnl_net_ops); |
1da177e4 LT |
2249 | } |
2250 | ||
2251 | module_init(ip6_tunnel_init); | |
2252 | module_exit(ip6_tunnel_cleanup); |