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> | |
32 | #include <linux/if_tunnel.h> | |
33 | #include <linux/net.h> | |
34 | #include <linux/in6.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/if_arp.h> | |
37 | #include <linux/icmpv6.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/route.h> | |
40 | #include <linux/rtnetlink.h> | |
41 | #include <linux/netfilter_ipv6.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
ddbe5032 | 43 | #include <linux/hash.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> | |
1da177e4 LT |
60 | |
61 | MODULE_AUTHOR("Ville Nuorvala"); | |
c4d3efaf | 62 | MODULE_DESCRIPTION("IPv6 tunneling device"); |
1da177e4 | 63 | MODULE_LICENSE("GPL"); |
6dfbd87a | 64 | MODULE_ALIAS_NETDEV("ip6tnl0"); |
1da177e4 | 65 | |
1da177e4 | 66 | #ifdef IP6_TNL_DEBUG |
91df42be | 67 | #define IP6_TNL_TRACE(x...) pr_debug("%s:" x "\n", __func__) |
1da177e4 LT |
68 | #else |
69 | #define IP6_TNL_TRACE(x...) do {;} while(0) | |
70 | #endif | |
71 | ||
72 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) | |
c4d3efaf | 73 | #define IPV6_TCLASS_SHIFT 20 |
1da177e4 | 74 | |
ddbe5032 ED |
75 | #define HASH_SIZE_SHIFT 5 |
76 | #define HASH_SIZE (1 << HASH_SIZE_SHIFT) | |
1da177e4 | 77 | |
f4e0b4c5 ND |
78 | static bool log_ecn_error = true; |
79 | module_param(log_ecn_error, bool, 0644); | |
80 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
81 | ||
ddbe5032 ED |
82 | static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2) |
83 | { | |
84 | u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2); | |
85 | ||
86 | return hash_32(hash, HASH_SIZE_SHIFT); | |
87 | } | |
1da177e4 | 88 | |
8560f226 | 89 | static int ip6_tnl_dev_init(struct net_device *dev); |
3144581c | 90 | static void ip6_tnl_dev_setup(struct net_device *dev); |
c075b130 | 91 | static struct rtnl_link_ops ip6_link_ops __read_mostly; |
1da177e4 | 92 | |
f99189b1 | 93 | static int ip6_tnl_net_id __read_mostly; |
13eeb8e9 | 94 | struct ip6_tnl_net { |
15820e12 PE |
95 | /* the IPv6 tunnel fallback device */ |
96 | struct net_device *fb_tnl_dev; | |
3e6c9fb5 | 97 | /* lists for storing tunnels in use */ |
94767632 ED |
98 | struct ip6_tnl __rcu *tnls_r_l[HASH_SIZE]; |
99 | struct ip6_tnl __rcu *tnls_wc[1]; | |
100 | struct ip6_tnl __rcu **tnls[2]; | |
13eeb8e9 PE |
101 | }; |
102 | ||
8560f226 ED |
103 | static struct net_device_stats *ip6_get_stats(struct net_device *dev) |
104 | { | |
105 | struct pcpu_tstats sum = { 0 }; | |
106 | int i; | |
107 | ||
108 | for_each_possible_cpu(i) { | |
109 | const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); | |
110 | ||
111 | sum.rx_packets += tstats->rx_packets; | |
112 | sum.rx_bytes += tstats->rx_bytes; | |
113 | sum.tx_packets += tstats->tx_packets; | |
114 | sum.tx_bytes += tstats->tx_bytes; | |
115 | } | |
116 | dev->stats.rx_packets = sum.rx_packets; | |
117 | dev->stats.rx_bytes = sum.rx_bytes; | |
118 | dev->stats.tx_packets = sum.tx_packets; | |
119 | dev->stats.tx_bytes = sum.tx_bytes; | |
120 | return &dev->stats; | |
121 | } | |
122 | ||
2922bc8a | 123 | /* |
94767632 | 124 | * Locking : hash tables are protected by RCU and RTNL |
2922bc8a | 125 | */ |
1da177e4 | 126 | |
c12b395a | 127 | struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t) |
1da177e4 LT |
128 | { |
129 | struct dst_entry *dst = t->dst_cache; | |
130 | ||
1ab1457c | 131 | if (dst && dst->obsolete && |
1da177e4 LT |
132 | dst->ops->check(dst, t->dst_cookie) == NULL) { |
133 | t->dst_cache = NULL; | |
134 | dst_release(dst); | |
135 | return NULL; | |
136 | } | |
137 | ||
138 | return dst; | |
139 | } | |
c12b395a | 140 | EXPORT_SYMBOL_GPL(ip6_tnl_dst_check); |
1da177e4 | 141 | |
c12b395a | 142 | void ip6_tnl_dst_reset(struct ip6_tnl *t) |
1da177e4 LT |
143 | { |
144 | dst_release(t->dst_cache); | |
145 | t->dst_cache = NULL; | |
146 | } | |
c12b395a | 147 | EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset); |
1da177e4 | 148 | |
c12b395a | 149 | void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst) |
1da177e4 LT |
150 | { |
151 | struct rt6_info *rt = (struct rt6_info *) dst; | |
152 | t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; | |
153 | dst_release(t->dst_cache); | |
154 | t->dst_cache = dst; | |
155 | } | |
c12b395a | 156 | EXPORT_SYMBOL_GPL(ip6_tnl_dst_store); |
1da177e4 LT |
157 | |
158 | /** | |
3144581c | 159 | * ip6_tnl_lookup - fetch tunnel matching the end-point addresses |
1ab1457c YH |
160 | * @remote: the address of the tunnel exit-point |
161 | * @local: the address of the tunnel entry-point | |
1da177e4 | 162 | * |
1ab1457c | 163 | * Return: |
1da177e4 | 164 | * tunnel matching given end-points if found, |
1ab1457c | 165 | * else fallback tunnel if its device is up, |
1da177e4 LT |
166 | * else %NULL |
167 | **/ | |
168 | ||
2922bc8a ED |
169 | #define for_each_ip6_tunnel_rcu(start) \ |
170 | for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) | |
171 | ||
1da177e4 | 172 | static struct ip6_tnl * |
b71d1d42 | 173 | ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local) |
1da177e4 | 174 | { |
ddbe5032 | 175 | unsigned int hash = HASH(remote, local); |
1da177e4 | 176 | struct ip6_tnl *t; |
3e6c9fb5 | 177 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4 | 178 | |
ddbe5032 | 179 | for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { |
1da177e4 LT |
180 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
181 | ipv6_addr_equal(remote, &t->parms.raddr) && | |
182 | (t->dev->flags & IFF_UP)) | |
183 | return t; | |
184 | } | |
2922bc8a ED |
185 | t = rcu_dereference(ip6n->tnls_wc[0]); |
186 | if (t && (t->dev->flags & IFF_UP)) | |
1da177e4 LT |
187 | return t; |
188 | ||
189 | return NULL; | |
190 | } | |
191 | ||
192 | /** | |
3144581c | 193 | * ip6_tnl_bucket - get head of list matching given tunnel parameters |
1ab1457c | 194 | * @p: parameters containing tunnel end-points |
1da177e4 LT |
195 | * |
196 | * Description: | |
3144581c | 197 | * ip6_tnl_bucket() returns the head of the list matching the |
1da177e4 LT |
198 | * &struct in6_addr entries laddr and raddr in @p. |
199 | * | |
1ab1457c | 200 | * Return: head of IPv6 tunnel list |
1da177e4 LT |
201 | **/ |
202 | ||
94767632 | 203 | static struct ip6_tnl __rcu ** |
c12b395a | 204 | ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p) |
1da177e4 | 205 | { |
b71d1d42 ED |
206 | const struct in6_addr *remote = &p->raddr; |
207 | const struct in6_addr *local = &p->laddr; | |
95c96174 | 208 | unsigned int h = 0; |
1da177e4 LT |
209 | int prio = 0; |
210 | ||
211 | if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) { | |
212 | prio = 1; | |
ddbe5032 | 213 | h = HASH(remote, local); |
1da177e4 | 214 | } |
3e6c9fb5 | 215 | return &ip6n->tnls[prio][h]; |
1da177e4 LT |
216 | } |
217 | ||
218 | /** | |
3144581c | 219 | * ip6_tnl_link - add tunnel to hash table |
1da177e4 LT |
220 | * @t: tunnel to be added |
221 | **/ | |
222 | ||
223 | static void | |
2dd02c89 | 224 | ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
1da177e4 | 225 | { |
94767632 | 226 | struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms); |
1da177e4 | 227 | |
cf778b00 ED |
228 | rcu_assign_pointer(t->next , rtnl_dereference(*tp)); |
229 | rcu_assign_pointer(*tp, t); | |
1da177e4 LT |
230 | } |
231 | ||
232 | /** | |
3144581c | 233 | * ip6_tnl_unlink - remove tunnel from hash table |
1da177e4 LT |
234 | * @t: tunnel to be removed |
235 | **/ | |
236 | ||
237 | static void | |
2dd02c89 | 238 | ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
1da177e4 | 239 | { |
94767632 ED |
240 | struct ip6_tnl __rcu **tp; |
241 | struct ip6_tnl *iter; | |
242 | ||
243 | for (tp = ip6_tnl_bucket(ip6n, &t->parms); | |
244 | (iter = rtnl_dereference(*tp)) != NULL; | |
245 | tp = &iter->next) { | |
246 | if (t == iter) { | |
cf778b00 | 247 | rcu_assign_pointer(*tp, t->next); |
1da177e4 LT |
248 | break; |
249 | } | |
250 | } | |
251 | } | |
252 | ||
8560f226 ED |
253 | static void ip6_dev_free(struct net_device *dev) |
254 | { | |
255 | free_percpu(dev->tstats); | |
256 | free_netdev(dev); | |
257 | } | |
258 | ||
0b112457 ND |
259 | static int ip6_tnl_create2(struct net_device *dev) |
260 | { | |
261 | struct ip6_tnl *t = netdev_priv(dev); | |
262 | struct net *net = dev_net(dev); | |
263 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
264 | int err; | |
265 | ||
266 | t = netdev_priv(dev); | |
267 | err = ip6_tnl_dev_init(dev); | |
268 | if (err < 0) | |
269 | goto out; | |
270 | ||
271 | err = register_netdevice(dev); | |
272 | if (err < 0) | |
273 | goto out; | |
274 | ||
275 | strcpy(t->parms.name, dev->name); | |
276 | dev->rtnl_link_ops = &ip6_link_ops; | |
277 | ||
278 | dev_hold(dev); | |
279 | ip6_tnl_link(ip6n, t); | |
280 | return 0; | |
281 | ||
282 | out: | |
283 | return err; | |
284 | } | |
285 | ||
1da177e4 | 286 | /** |
2c53040f | 287 | * ip6_tnl_create - create a new tunnel |
1da177e4 LT |
288 | * @p: tunnel parameters |
289 | * @pt: pointer to new tunnel | |
290 | * | |
291 | * Description: | |
292 | * Create tunnel matching given parameters. | |
1ab1457c YH |
293 | * |
294 | * Return: | |
567131a7 | 295 | * created tunnel or NULL |
1da177e4 LT |
296 | **/ |
297 | ||
c12b395a | 298 | static struct ip6_tnl *ip6_tnl_create(struct net *net, struct __ip6_tnl_parm *p) |
1da177e4 LT |
299 | { |
300 | struct net_device *dev; | |
301 | struct ip6_tnl *t; | |
302 | char name[IFNAMSIZ]; | |
303 | int err; | |
304 | ||
34cc7ba6 | 305 | if (p->name[0]) |
1da177e4 | 306 | strlcpy(name, p->name, IFNAMSIZ); |
34cc7ba6 PE |
307 | else |
308 | sprintf(name, "ip6tnl%%d"); | |
309 | ||
3144581c | 310 | dev = alloc_netdev(sizeof (*t), name, ip6_tnl_dev_setup); |
1da177e4 | 311 | if (dev == NULL) |
567131a7 | 312 | goto failed; |
1da177e4 | 313 | |
554eb277 PE |
314 | dev_net_set(dev, net); |
315 | ||
2941a486 | 316 | t = netdev_priv(dev); |
1da177e4 | 317 | t->parms = *p; |
0b112457 | 318 | err = ip6_tnl_create2(dev); |
8560f226 ED |
319 | if (err < 0) |
320 | goto failed_free; | |
1da177e4 | 321 | |
567131a7 | 322 | return t; |
b37d428b PE |
323 | |
324 | failed_free: | |
8560f226 | 325 | ip6_dev_free(dev); |
567131a7 VN |
326 | failed: |
327 | return NULL; | |
1da177e4 LT |
328 | } |
329 | ||
330 | /** | |
3144581c | 331 | * ip6_tnl_locate - find or create tunnel matching given parameters |
1ab1457c | 332 | * @p: tunnel parameters |
1da177e4 LT |
333 | * @create: != 0 if allowed to create new tunnel if no match found |
334 | * | |
335 | * Description: | |
3144581c | 336 | * ip6_tnl_locate() first tries to locate an existing tunnel |
1da177e4 LT |
337 | * based on @parms. If this is unsuccessful, but @create is set a new |
338 | * tunnel device is created and registered for use. | |
339 | * | |
340 | * Return: | |
567131a7 | 341 | * matching tunnel or NULL |
1da177e4 LT |
342 | **/ |
343 | ||
2dd02c89 | 344 | static struct ip6_tnl *ip6_tnl_locate(struct net *net, |
c12b395a | 345 | struct __ip6_tnl_parm *p, int create) |
1da177e4 | 346 | { |
b71d1d42 ED |
347 | const struct in6_addr *remote = &p->raddr; |
348 | const struct in6_addr *local = &p->laddr; | |
94767632 | 349 | struct ip6_tnl __rcu **tp; |
1da177e4 | 350 | struct ip6_tnl *t; |
2dd02c89 | 351 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
1da177e4 | 352 | |
94767632 ED |
353 | for (tp = ip6_tnl_bucket(ip6n, p); |
354 | (t = rtnl_dereference(*tp)) != NULL; | |
355 | tp = &t->next) { | |
1da177e4 | 356 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
567131a7 VN |
357 | ipv6_addr_equal(remote, &t->parms.raddr)) |
358 | return t; | |
1da177e4 LT |
359 | } |
360 | if (!create) | |
567131a7 | 361 | return NULL; |
2dd02c89 | 362 | return ip6_tnl_create(net, p); |
1da177e4 LT |
363 | } |
364 | ||
365 | /** | |
3144581c | 366 | * ip6_tnl_dev_uninit - tunnel device uninitializer |
1da177e4 | 367 | * @dev: the device to be destroyed |
1ab1457c | 368 | * |
1da177e4 | 369 | * Description: |
3144581c | 370 | * ip6_tnl_dev_uninit() removes tunnel from its list |
1da177e4 LT |
371 | **/ |
372 | ||
373 | static void | |
3144581c | 374 | ip6_tnl_dev_uninit(struct net_device *dev) |
1da177e4 | 375 | { |
2941a486 | 376 | struct ip6_tnl *t = netdev_priv(dev); |
2dd02c89 PE |
377 | struct net *net = dev_net(dev); |
378 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1da177e4 | 379 | |
94767632 | 380 | if (dev == ip6n->fb_tnl_dev) |
a9b3cd7f | 381 | RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL); |
94767632 | 382 | else |
2dd02c89 | 383 | ip6_tnl_unlink(ip6n, t); |
1da177e4 LT |
384 | ip6_tnl_dst_reset(t); |
385 | dev_put(dev); | |
386 | } | |
387 | ||
388 | /** | |
389 | * parse_tvl_tnl_enc_lim - handle encapsulation limit option | |
390 | * @skb: received socket buffer | |
391 | * | |
1ab1457c YH |
392 | * Return: |
393 | * 0 if none was found, | |
1da177e4 LT |
394 | * else index to encapsulation limit |
395 | **/ | |
396 | ||
c12b395a | 397 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw) |
1da177e4 | 398 | { |
b71d1d42 | 399 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) raw; |
1da177e4 LT |
400 | __u8 nexthdr = ipv6h->nexthdr; |
401 | __u16 off = sizeof (*ipv6h); | |
402 | ||
403 | while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) { | |
404 | __u16 optlen = 0; | |
405 | struct ipv6_opt_hdr *hdr; | |
406 | if (raw + off + sizeof (*hdr) > skb->data && | |
407 | !pskb_may_pull(skb, raw - skb->data + off + sizeof (*hdr))) | |
408 | break; | |
409 | ||
410 | hdr = (struct ipv6_opt_hdr *) (raw + off); | |
411 | if (nexthdr == NEXTHDR_FRAGMENT) { | |
412 | struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr; | |
413 | if (frag_hdr->frag_off) | |
414 | break; | |
415 | optlen = 8; | |
416 | } else if (nexthdr == NEXTHDR_AUTH) { | |
417 | optlen = (hdr->hdrlen + 2) << 2; | |
418 | } else { | |
419 | optlen = ipv6_optlen(hdr); | |
420 | } | |
421 | if (nexthdr == NEXTHDR_DEST) { | |
422 | __u16 i = off + 2; | |
423 | while (1) { | |
424 | struct ipv6_tlv_tnl_enc_lim *tel; | |
425 | ||
426 | /* No more room for encapsulation limit */ | |
427 | if (i + sizeof (*tel) > off + optlen) | |
428 | break; | |
429 | ||
430 | tel = (struct ipv6_tlv_tnl_enc_lim *) &raw[i]; | |
431 | /* return index of option if found and valid */ | |
432 | if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT && | |
433 | tel->length == 1) | |
434 | return i; | |
435 | /* else jump to next option */ | |
436 | if (tel->type) | |
437 | i += tel->length + 2; | |
438 | else | |
439 | i++; | |
440 | } | |
441 | } | |
442 | nexthdr = hdr->nexthdr; | |
443 | off += optlen; | |
444 | } | |
445 | return 0; | |
446 | } | |
c12b395a | 447 | EXPORT_SYMBOL(ip6_tnl_parse_tlv_enc_lim); |
1da177e4 LT |
448 | |
449 | /** | |
e490d1d8 | 450 | * ip6_tnl_err - tunnel error handler |
1da177e4 LT |
451 | * |
452 | * Description: | |
e490d1d8 | 453 | * ip6_tnl_err() should handle errors in the tunnel according |
1da177e4 LT |
454 | * to the specifications in RFC 2473. |
455 | **/ | |
456 | ||
d2acc347 | 457 | static int |
502b0935 | 458 | ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, |
d5fdd6ba | 459 | u8 *type, u8 *code, int *msg, __u32 *info, int offset) |
1da177e4 | 460 | { |
b71d1d42 | 461 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) skb->data; |
1da177e4 LT |
462 | struct ip6_tnl *t; |
463 | int rel_msg = 0; | |
d5fdd6ba BH |
464 | u8 rel_type = ICMPV6_DEST_UNREACH; |
465 | u8 rel_code = ICMPV6_ADDR_UNREACH; | |
1da177e4 LT |
466 | __u32 rel_info = 0; |
467 | __u16 len; | |
d2acc347 | 468 | int err = -ENOENT; |
1da177e4 | 469 | |
1ab1457c YH |
470 | /* If the packet doesn't contain the original IPv6 header we are |
471 | in trouble since we might need the source address for further | |
1da177e4 LT |
472 | processing of the error. */ |
473 | ||
2922bc8a | 474 | rcu_read_lock(); |
8704ca7e | 475 | if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->daddr, |
2dd02c89 | 476 | &ipv6h->saddr)) == NULL) |
1da177e4 LT |
477 | goto out; |
478 | ||
502b0935 YK |
479 | if (t->parms.proto != ipproto && t->parms.proto != 0) |
480 | goto out; | |
481 | ||
d2acc347 HX |
482 | err = 0; |
483 | ||
e490d1d8 | 484 | switch (*type) { |
1da177e4 LT |
485 | __u32 teli; |
486 | struct ipv6_tlv_tnl_enc_lim *tel; | |
487 | __u32 mtu; | |
488 | case ICMPV6_DEST_UNREACH: | |
e87cc472 JP |
489 | net_warn_ratelimited("%s: Path to destination invalid or inactive!\n", |
490 | t->parms.name); | |
1da177e4 LT |
491 | rel_msg = 1; |
492 | break; | |
493 | case ICMPV6_TIME_EXCEED: | |
e490d1d8 | 494 | if ((*code) == ICMPV6_EXC_HOPLIMIT) { |
e87cc472 JP |
495 | net_warn_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n", |
496 | t->parms.name); | |
1da177e4 LT |
497 | rel_msg = 1; |
498 | } | |
499 | break; | |
500 | case ICMPV6_PARAMPROB: | |
107a5fe6 | 501 | teli = 0; |
e490d1d8 | 502 | if ((*code) == ICMPV6_HDR_FIELD) |
c12b395a | 503 | teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data); |
1da177e4 | 504 | |
704eae1f | 505 | if (teli && teli == *info - 2) { |
1da177e4 LT |
506 | tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; |
507 | if (tel->encap_limit == 0) { | |
e87cc472 JP |
508 | net_warn_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n", |
509 | t->parms.name); | |
1da177e4 LT |
510 | rel_msg = 1; |
511 | } | |
e87cc472 JP |
512 | } else { |
513 | net_warn_ratelimited("%s: Recipient unable to parse tunneled packet!\n", | |
514 | t->parms.name); | |
1da177e4 LT |
515 | } |
516 | break; | |
517 | case ICMPV6_PKT_TOOBIG: | |
704eae1f | 518 | mtu = *info - offset; |
1da177e4 LT |
519 | if (mtu < IPV6_MIN_MTU) |
520 | mtu = IPV6_MIN_MTU; | |
521 | t->dev->mtu = mtu; | |
522 | ||
cc6cdac0 | 523 | if ((len = sizeof (*ipv6h) + ntohs(ipv6h->payload_len)) > mtu) { |
1da177e4 LT |
524 | rel_type = ICMPV6_PKT_TOOBIG; |
525 | rel_code = 0; | |
526 | rel_info = mtu; | |
527 | rel_msg = 1; | |
528 | } | |
529 | break; | |
530 | } | |
e490d1d8 YK |
531 | |
532 | *type = rel_type; | |
533 | *code = rel_code; | |
534 | *info = rel_info; | |
535 | *msg = rel_msg; | |
536 | ||
537 | out: | |
2922bc8a | 538 | rcu_read_unlock(); |
e490d1d8 YK |
539 | return err; |
540 | } | |
541 | ||
c4d3efaf YK |
542 | static int |
543 | ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 544 | u8 type, u8 code, int offset, __be32 info) |
c4d3efaf YK |
545 | { |
546 | int rel_msg = 0; | |
d5fdd6ba BH |
547 | u8 rel_type = type; |
548 | u8 rel_code = code; | |
704eae1f | 549 | __u32 rel_info = ntohl(info); |
c4d3efaf YK |
550 | int err; |
551 | struct sk_buff *skb2; | |
b71d1d42 | 552 | const struct iphdr *eiph; |
c4d3efaf | 553 | struct rtable *rt; |
31e4543d | 554 | struct flowi4 fl4; |
c4d3efaf | 555 | |
502b0935 YK |
556 | err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code, |
557 | &rel_msg, &rel_info, offset); | |
c4d3efaf YK |
558 | if (err < 0) |
559 | return err; | |
560 | ||
561 | if (rel_msg == 0) | |
562 | return 0; | |
563 | ||
564 | switch (rel_type) { | |
565 | case ICMPV6_DEST_UNREACH: | |
566 | if (rel_code != ICMPV6_ADDR_UNREACH) | |
567 | return 0; | |
568 | rel_type = ICMP_DEST_UNREACH; | |
569 | rel_code = ICMP_HOST_UNREACH; | |
570 | break; | |
571 | case ICMPV6_PKT_TOOBIG: | |
572 | if (rel_code != 0) | |
573 | return 0; | |
574 | rel_type = ICMP_DEST_UNREACH; | |
575 | rel_code = ICMP_FRAG_NEEDED; | |
576 | break; | |
ec18d9a2 DM |
577 | case NDISC_REDIRECT: |
578 | rel_type = ICMP_REDIRECT; | |
579 | rel_code = ICMP_REDIR_HOST; | |
c4d3efaf YK |
580 | default: |
581 | return 0; | |
582 | } | |
583 | ||
584 | if (!pskb_may_pull(skb, offset + sizeof(struct iphdr))) | |
585 | return 0; | |
586 | ||
587 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
588 | if (!skb2) | |
589 | return 0; | |
590 | ||
adf30907 ED |
591 | skb_dst_drop(skb2); |
592 | ||
c4d3efaf | 593 | skb_pull(skb2, offset); |
c1d2bbe1 | 594 | skb_reset_network_header(skb2); |
eddc9ec5 | 595 | eiph = ip_hdr(skb2); |
c4d3efaf YK |
596 | |
597 | /* Try to guess incoming interface */ | |
31e4543d | 598 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
78fbfd8a DM |
599 | eiph->saddr, 0, |
600 | 0, 0, | |
601 | IPPROTO_IPIP, RT_TOS(eiph->tos), 0); | |
b23dd4fe | 602 | if (IS_ERR(rt)) |
c4d3efaf YK |
603 | goto out; |
604 | ||
d8d1f30b | 605 | skb2->dev = rt->dst.dev; |
c4d3efaf YK |
606 | |
607 | /* route "incoming" packet */ | |
608 | if (rt->rt_flags & RTCF_LOCAL) { | |
609 | ip_rt_put(rt); | |
610 | rt = NULL; | |
31e4543d | 611 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
78fbfd8a DM |
612 | eiph->daddr, eiph->saddr, |
613 | 0, 0, | |
614 | IPPROTO_IPIP, | |
615 | RT_TOS(eiph->tos), 0); | |
b23dd4fe | 616 | if (IS_ERR(rt) || |
d8d1f30b | 617 | rt->dst.dev->type != ARPHRD_TUNNEL) { |
b23dd4fe DM |
618 | if (!IS_ERR(rt)) |
619 | ip_rt_put(rt); | |
c4d3efaf YK |
620 | goto out; |
621 | } | |
b23dd4fe | 622 | skb_dst_set(skb2, &rt->dst); |
c4d3efaf YK |
623 | } else { |
624 | ip_rt_put(rt); | |
625 | if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, | |
626 | skb2->dev) || | |
adf30907 | 627 | skb_dst(skb2)->dev->type != ARPHRD_TUNNEL) |
c4d3efaf YK |
628 | goto out; |
629 | } | |
630 | ||
631 | /* change mtu on this route */ | |
632 | if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) { | |
adf30907 | 633 | if (rel_info > dst_mtu(skb_dst(skb2))) |
c4d3efaf YK |
634 | goto out; |
635 | ||
6700c270 | 636 | skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), NULL, skb2, rel_info); |
c4d3efaf | 637 | } |
1ed5c48f | 638 | if (rel_type == ICMP_REDIRECT) |
6700c270 | 639 | skb_dst(skb2)->ops->redirect(skb_dst(skb2), NULL, skb2); |
c4d3efaf | 640 | |
704eae1f | 641 | icmp_send(skb2, rel_type, rel_code, htonl(rel_info)); |
c4d3efaf YK |
642 | |
643 | out: | |
644 | kfree_skb(skb2); | |
645 | return 0; | |
646 | } | |
647 | ||
e490d1d8 YK |
648 | static int |
649 | ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 650 | u8 type, u8 code, int offset, __be32 info) |
e490d1d8 YK |
651 | { |
652 | int rel_msg = 0; | |
d5fdd6ba BH |
653 | u8 rel_type = type; |
654 | u8 rel_code = code; | |
704eae1f | 655 | __u32 rel_info = ntohl(info); |
e490d1d8 YK |
656 | int err; |
657 | ||
502b0935 YK |
658 | err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code, |
659 | &rel_msg, &rel_info, offset); | |
e490d1d8 YK |
660 | if (err < 0) |
661 | return err; | |
662 | ||
663 | if (rel_msg && pskb_may_pull(skb, offset + sizeof(struct ipv6hdr))) { | |
1da177e4 LT |
664 | struct rt6_info *rt; |
665 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
305d4b3c | 666 | |
1da177e4 | 667 | if (!skb2) |
e490d1d8 | 668 | return 0; |
1da177e4 | 669 | |
adf30907 | 670 | skb_dst_drop(skb2); |
1da177e4 | 671 | skb_pull(skb2, offset); |
c1d2bbe1 | 672 | skb_reset_network_header(skb2); |
1da177e4 LT |
673 | |
674 | /* Try to guess incoming interface */ | |
2f7f54b7 PE |
675 | rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, |
676 | NULL, 0, 0); | |
1da177e4 | 677 | |
d1918542 DM |
678 | if (rt && rt->dst.dev) |
679 | skb2->dev = rt->dst.dev; | |
1da177e4 | 680 | |
3ffe533c | 681 | icmpv6_send(skb2, rel_type, rel_code, rel_info); |
1da177e4 | 682 | |
94e187c0 | 683 | ip6_rt_put(rt); |
1da177e4 LT |
684 | |
685 | kfree_skb(skb2); | |
686 | } | |
e490d1d8 YK |
687 | |
688 | return 0; | |
1da177e4 LT |
689 | } |
690 | ||
f4e0b4c5 ND |
691 | static int ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
692 | const struct ipv6hdr *ipv6h, | |
693 | struct sk_buff *skb) | |
c4d3efaf YK |
694 | { |
695 | __u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK; | |
696 | ||
697 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) | |
eddc9ec5 | 698 | ipv4_change_dsfield(ip_hdr(skb), INET_ECN_MASK, dsfield); |
c4d3efaf | 699 | |
f4e0b4c5 | 700 | return IP6_ECN_decapsulate(ipv6h, skb); |
c4d3efaf YK |
701 | } |
702 | ||
f4e0b4c5 ND |
703 | static int ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
704 | const struct ipv6hdr *ipv6h, | |
705 | struct sk_buff *skb) | |
1da177e4 | 706 | { |
8359925b | 707 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
29bb43b4 | 708 | ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb)); |
1da177e4 | 709 | |
f4e0b4c5 | 710 | return IP6_ECN_decapsulate(ipv6h, skb); |
1da177e4 | 711 | } |
8359925b | 712 | |
c12b395a | 713 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, |
d0087b29 VN |
714 | const struct in6_addr *laddr, |
715 | const struct in6_addr *raddr) | |
716 | { | |
c12b395a | 717 | struct __ip6_tnl_parm *p = &t->parms; |
d0087b29 VN |
718 | int ltype = ipv6_addr_type(laddr); |
719 | int rtype = ipv6_addr_type(raddr); | |
720 | __u32 flags = 0; | |
721 | ||
722 | if (ltype == IPV6_ADDR_ANY || rtype == IPV6_ADDR_ANY) { | |
723 | flags = IP6_TNL_F_CAP_PER_PACKET; | |
724 | } else if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && | |
725 | rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && | |
726 | !((ltype|rtype) & IPV6_ADDR_LOOPBACK) && | |
727 | (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) { | |
728 | if (ltype&IPV6_ADDR_UNICAST) | |
729 | flags |= IP6_TNL_F_CAP_XMIT; | |
730 | if (rtype&IPV6_ADDR_UNICAST) | |
731 | flags |= IP6_TNL_F_CAP_RCV; | |
732 | } | |
733 | return flags; | |
734 | } | |
c12b395a | 735 | EXPORT_SYMBOL(ip6_tnl_get_cap); |
d0087b29 | 736 | |
f1a28eab | 737 | /* called with rcu_read_lock() */ |
c12b395a | 738 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, |
d0087b29 VN |
739 | const struct in6_addr *laddr, |
740 | const struct in6_addr *raddr) | |
09c6bbf0 | 741 | { |
c12b395a | 742 | struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf0 | 743 | int ret = 0; |
2f7f54b7 | 744 | struct net *net = dev_net(t->dev); |
09c6bbf0 | 745 | |
d0087b29 VN |
746 | if ((p->flags & IP6_TNL_F_CAP_RCV) || |
747 | ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && | |
748 | (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_RCV))) { | |
1ab1457c | 749 | struct net_device *ldev = NULL; |
09c6bbf0 VN |
750 | |
751 | if (p->link) | |
f1a28eab | 752 | ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf0 | 753 | |
d0087b29 VN |
754 | if ((ipv6_addr_is_multicast(laddr) || |
755 | likely(ipv6_chk_addr(net, laddr, ldev, 0))) && | |
756 | likely(!ipv6_chk_addr(net, raddr, NULL, 0))) | |
09c6bbf0 | 757 | ret = 1; |
09c6bbf0 VN |
758 | } |
759 | return ret; | |
760 | } | |
c12b395a | 761 | EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl); |
1da177e4 LT |
762 | |
763 | /** | |
3144581c | 764 | * ip6_tnl_rcv - decapsulate IPv6 packet and retransmit it locally |
1da177e4 | 765 | * @skb: received socket buffer |
8359925b YK |
766 | * @protocol: ethernet protocol ID |
767 | * @dscp_ecn_decapsulate: the function to decapsulate DSCP code and ECN | |
1da177e4 LT |
768 | * |
769 | * Return: 0 | |
770 | **/ | |
771 | ||
8359925b | 772 | static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol, |
502b0935 | 773 | __u8 ipproto, |
f4e0b4c5 ND |
774 | int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, |
775 | const struct ipv6hdr *ipv6h, | |
776 | struct sk_buff *skb)) | |
1da177e4 | 777 | { |
1da177e4 | 778 | struct ip6_tnl *t; |
b71d1d42 | 779 | const struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
f4e0b4c5 | 780 | int err; |
1da177e4 | 781 | |
2922bc8a | 782 | rcu_read_lock(); |
1da177e4 | 783 | |
8704ca7e | 784 | if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr, |
2dd02c89 | 785 | &ipv6h->daddr)) != NULL) { |
8560f226 ED |
786 | struct pcpu_tstats *tstats; |
787 | ||
502b0935 | 788 | if (t->parms.proto != ipproto && t->parms.proto != 0) { |
2922bc8a | 789 | rcu_read_unlock(); |
502b0935 YK |
790 | goto discard; |
791 | } | |
792 | ||
1da177e4 | 793 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
2922bc8a | 794 | rcu_read_unlock(); |
50fba2aa | 795 | goto discard; |
1da177e4 LT |
796 | } |
797 | ||
d0087b29 | 798 | if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) { |
3dca02af | 799 | t->dev->stats.rx_dropped++; |
2922bc8a | 800 | rcu_read_unlock(); |
1da177e4 LT |
801 | goto discard; |
802 | } | |
803 | secpath_reset(skb); | |
b0e380b1 | 804 | skb->mac_header = skb->network_header; |
c1d2bbe1 | 805 | skb_reset_network_header(skb); |
8359925b | 806 | skb->protocol = htons(protocol); |
1da177e4 LT |
807 | skb->pkt_type = PACKET_HOST; |
808 | memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); | |
8359925b | 809 | |
f4e0b4c5 ND |
810 | __skb_tunnel_rx(skb, t->dev); |
811 | ||
812 | err = dscp_ecn_decapsulate(t, ipv6h, skb); | |
813 | if (unlikely(err)) { | |
814 | if (log_ecn_error) | |
815 | net_info_ratelimited("non-ECT from %pI6 with dsfield=%#x\n", | |
816 | &ipv6h->saddr, | |
817 | ipv6_get_dsfield(ipv6h)); | |
818 | if (err > 1) { | |
819 | ++t->dev->stats.rx_frame_errors; | |
820 | ++t->dev->stats.rx_errors; | |
821 | rcu_read_unlock(); | |
822 | goto discard; | |
823 | } | |
824 | } | |
825 | ||
8560f226 ED |
826 | tstats = this_cpu_ptr(t->dev->tstats); |
827 | tstats->rx_packets++; | |
828 | tstats->rx_bytes += skb->len; | |
829 | ||
caf586e5 | 830 | netif_rx(skb); |
8990f468 | 831 | |
2922bc8a | 832 | rcu_read_unlock(); |
1da177e4 LT |
833 | return 0; |
834 | } | |
2922bc8a | 835 | rcu_read_unlock(); |
1da177e4 | 836 | return 1; |
50fba2aa HX |
837 | |
838 | discard: | |
839 | kfree_skb(skb); | |
840 | return 0; | |
1da177e4 LT |
841 | } |
842 | ||
c4d3efaf YK |
843 | static int ip4ip6_rcv(struct sk_buff *skb) |
844 | { | |
502b0935 YK |
845 | return ip6_tnl_rcv(skb, ETH_P_IP, IPPROTO_IPIP, |
846 | ip4ip6_dscp_ecn_decapsulate); | |
c4d3efaf YK |
847 | } |
848 | ||
8359925b YK |
849 | static int ip6ip6_rcv(struct sk_buff *skb) |
850 | { | |
502b0935 YK |
851 | return ip6_tnl_rcv(skb, ETH_P_IPV6, IPPROTO_IPV6, |
852 | ip6ip6_dscp_ecn_decapsulate); | |
8359925b YK |
853 | } |
854 | ||
6fb32dde VN |
855 | struct ipv6_tel_txoption { |
856 | struct ipv6_txoptions ops; | |
857 | __u8 dst_opt[8]; | |
858 | }; | |
1da177e4 | 859 | |
6fb32dde VN |
860 | static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit) |
861 | { | |
862 | memset(opt, 0, sizeof(struct ipv6_tel_txoption)); | |
1da177e4 | 863 | |
6fb32dde VN |
864 | opt->dst_opt[2] = IPV6_TLV_TNL_ENCAP_LIMIT; |
865 | opt->dst_opt[3] = 1; | |
866 | opt->dst_opt[4] = encap_limit; | |
867 | opt->dst_opt[5] = IPV6_TLV_PADN; | |
868 | opt->dst_opt[6] = 1; | |
1da177e4 | 869 | |
6fb32dde VN |
870 | opt->ops.dst0opt = (struct ipv6_opt_hdr *) opt->dst_opt; |
871 | opt->ops.opt_nflen = 8; | |
1da177e4 LT |
872 | } |
873 | ||
874 | /** | |
3144581c | 875 | * ip6_tnl_addr_conflict - compare packet addresses to tunnel's own |
1da177e4 | 876 | * @t: the outgoing tunnel device |
1ab1457c | 877 | * @hdr: IPv6 header from the incoming packet |
1da177e4 LT |
878 | * |
879 | * Description: | |
1ab1457c | 880 | * Avoid trivial tunneling loop by checking that tunnel exit-point |
1da177e4 LT |
881 | * doesn't match source of incoming packet. |
882 | * | |
1ab1457c | 883 | * Return: |
1da177e4 LT |
884 | * 1 if conflict, |
885 | * 0 else | |
886 | **/ | |
887 | ||
92113bfd | 888 | static inline bool |
b71d1d42 | 889 | ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr) |
1da177e4 LT |
890 | { |
891 | return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); | |
892 | } | |
893 | ||
c12b395a | 894 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t) |
09c6bbf0 | 895 | { |
c12b395a | 896 | struct __ip6_tnl_parm *p = &t->parms; |
09c6bbf0 | 897 | int ret = 0; |
2f7f54b7 | 898 | struct net *net = dev_net(t->dev); |
09c6bbf0 | 899 | |
1ab1457c | 900 | if (p->flags & IP6_TNL_F_CAP_XMIT) { |
09c6bbf0 VN |
901 | struct net_device *ldev = NULL; |
902 | ||
f1a28eab | 903 | rcu_read_lock(); |
09c6bbf0 | 904 | if (p->link) |
f1a28eab | 905 | ldev = dev_get_by_index_rcu(net, p->link); |
09c6bbf0 | 906 | |
2f7f54b7 | 907 | if (unlikely(!ipv6_chk_addr(net, &p->laddr, ldev, 0))) |
f3213831 JP |
908 | pr_warn("%s xmit: Local address not yet configured!\n", |
909 | p->name); | |
09c6bbf0 | 910 | else if (!ipv6_addr_is_multicast(&p->raddr) && |
2f7f54b7 | 911 | unlikely(ipv6_chk_addr(net, &p->raddr, NULL, 0))) |
f3213831 JP |
912 | pr_warn("%s xmit: Routing loop! Remote address found on this node!\n", |
913 | p->name); | |
09c6bbf0 VN |
914 | else |
915 | ret = 1; | |
f1a28eab | 916 | rcu_read_unlock(); |
09c6bbf0 VN |
917 | } |
918 | return ret; | |
919 | } | |
c12b395a | 920 | EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl); |
921 | ||
1da177e4 | 922 | /** |
61ec2aec | 923 | * ip6_tnl_xmit2 - encapsulate packet and send |
1da177e4 | 924 | * @skb: the outgoing socket buffer |
1ab1457c | 925 | * @dev: the outgoing tunnel device |
61ec2aec YK |
926 | * @dsfield: dscp code for outer header |
927 | * @fl: flow of tunneled packet | |
928 | * @encap_limit: encapsulation limit | |
929 | * @pmtu: Path MTU is stored if packet is too big | |
1da177e4 LT |
930 | * |
931 | * Description: | |
932 | * Build new header and do some sanity checks on the packet before sending | |
933 | * it. | |
934 | * | |
1ab1457c | 935 | * Return: |
c4d3efaf | 936 | * 0 on success |
61ec2aec YK |
937 | * -1 fail |
938 | * %-EMSGSIZE message too big. return mtu in this case. | |
1da177e4 LT |
939 | **/ |
940 | ||
61ec2aec YK |
941 | static int ip6_tnl_xmit2(struct sk_buff *skb, |
942 | struct net_device *dev, | |
943 | __u8 dsfield, | |
4c9483b2 | 944 | struct flowi6 *fl6, |
61ec2aec YK |
945 | int encap_limit, |
946 | __u32 *pmtu) | |
1da177e4 | 947 | { |
52479b62 | 948 | struct net *net = dev_net(dev); |
2941a486 | 949 | struct ip6_tnl *t = netdev_priv(dev); |
3dca02af | 950 | struct net_device_stats *stats = &t->dev->stats; |
0660e03f | 951 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
6fb32dde | 952 | struct ipv6_tel_txoption opt; |
d24f22f3 | 953 | struct dst_entry *dst = NULL, *ndst = NULL; |
1da177e4 LT |
954 | struct net_device *tdev; |
955 | int mtu; | |
c2636b4d | 956 | unsigned int max_headroom = sizeof(struct ipv6hdr); |
1da177e4 | 957 | u8 proto; |
61ec2aec | 958 | int err = -1; |
1da177e4 | 959 | |
d24f22f3 ED |
960 | if (!fl6->flowi6_mark) |
961 | dst = ip6_tnl_dst_check(t); | |
89b02126 ED |
962 | if (!dst) { |
963 | ndst = ip6_route_output(net, NULL, fl6); | |
1da177e4 | 964 | |
89b02126 | 965 | if (ndst->error) |
a57ebc90 | 966 | goto tx_err_link_failure; |
89b02126 ED |
967 | ndst = xfrm_lookup(net, ndst, flowi6_to_flowi(fl6), NULL, 0); |
968 | if (IS_ERR(ndst)) { | |
969 | err = PTR_ERR(ndst); | |
970 | ndst = NULL; | |
452edd59 DM |
971 | goto tx_err_link_failure; |
972 | } | |
89b02126 | 973 | dst = ndst; |
a57ebc90 | 974 | } |
1da177e4 LT |
975 | |
976 | tdev = dst->dev; | |
977 | ||
978 | if (tdev == dev) { | |
979 | stats->collisions++; | |
e87cc472 JP |
980 | net_warn_ratelimited("%s: Local routing loop detected!\n", |
981 | t->parms.name); | |
1da177e4 LT |
982 | goto tx_err_dst_release; |
983 | } | |
984 | mtu = dst_mtu(dst) - sizeof (*ipv6h); | |
6fb32dde | 985 | if (encap_limit >= 0) { |
1da177e4 LT |
986 | max_headroom += 8; |
987 | mtu -= 8; | |
988 | } | |
989 | if (mtu < IPV6_MIN_MTU) | |
990 | mtu = IPV6_MIN_MTU; | |
adf30907 | 991 | if (skb_dst(skb)) |
6700c270 | 992 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
1da177e4 | 993 | if (skb->len > mtu) { |
61ec2aec YK |
994 | *pmtu = mtu; |
995 | err = -EMSGSIZE; | |
1da177e4 LT |
996 | goto tx_err_dst_release; |
997 | } | |
998 | ||
999 | /* | |
1000 | * Okay, now see if we can stuff it in the buffer as-is. | |
1001 | */ | |
1002 | max_headroom += LL_RESERVED_SPACE(tdev); | |
1ab1457c | 1003 | |
cfbba49d PM |
1004 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
1005 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { | |
1da177e4 | 1006 | struct sk_buff *new_skb; |
1ab1457c | 1007 | |
1da177e4 LT |
1008 | if (!(new_skb = skb_realloc_headroom(skb, max_headroom))) |
1009 | goto tx_err_dst_release; | |
1010 | ||
1011 | if (skb->sk) | |
1012 | skb_set_owner_w(new_skb, skb->sk); | |
9ff26449 | 1013 | consume_skb(skb); |
1da177e4 LT |
1014 | skb = new_skb; |
1015 | } | |
adf30907 | 1016 | skb_dst_drop(skb); |
d24f22f3 ED |
1017 | if (fl6->flowi6_mark) { |
1018 | skb_dst_set(skb, dst); | |
1019 | ndst = NULL; | |
1020 | } else { | |
1021 | skb_dst_set_noref(skb, dst); | |
1022 | } | |
b0e380b1 | 1023 | skb->transport_header = skb->network_header; |
1da177e4 | 1024 | |
4c9483b2 | 1025 | proto = fl6->flowi6_proto; |
6fb32dde VN |
1026 | if (encap_limit >= 0) { |
1027 | init_tel_txopt(&opt, encap_limit); | |
1028 | ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL); | |
1029 | } | |
e2d1bca7 ACM |
1030 | skb_push(skb, sizeof(struct ipv6hdr)); |
1031 | skb_reset_network_header(skb); | |
0660e03f | 1032 | ipv6h = ipv6_hdr(skb); |
3e4e4c1f | 1033 | ip6_flow_hdr(ipv6h, INET_ECN_encapsulate(0, dsfield), fl6->flowlabel); |
1da177e4 LT |
1034 | ipv6h->hop_limit = t->parms.hop_limit; |
1035 | ipv6h->nexthdr = proto; | |
4e3fd7a0 AD |
1036 | ipv6h->saddr = fl6->saddr; |
1037 | ipv6h->daddr = fl6->daddr; | |
e8f72ea4 | 1038 | ip6tunnel_xmit(skb, dev); |
89b02126 ED |
1039 | if (ndst) |
1040 | ip6_tnl_dst_store(t, ndst); | |
1da177e4 LT |
1041 | return 0; |
1042 | tx_err_link_failure: | |
1043 | stats->tx_carrier_errors++; | |
1044 | dst_link_failure(skb); | |
1045 | tx_err_dst_release: | |
89b02126 | 1046 | dst_release(ndst); |
61ec2aec YK |
1047 | return err; |
1048 | } | |
1049 | ||
c4d3efaf YK |
1050 | static inline int |
1051 | ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) | |
1052 | { | |
1053 | struct ip6_tnl *t = netdev_priv(dev); | |
b71d1d42 | 1054 | const struct iphdr *iph = ip_hdr(skb); |
c4d3efaf | 1055 | int encap_limit = -1; |
4c9483b2 | 1056 | struct flowi6 fl6; |
c4d3efaf YK |
1057 | __u8 dsfield; |
1058 | __u32 mtu; | |
1059 | int err; | |
1060 | ||
502b0935 YK |
1061 | if ((t->parms.proto != IPPROTO_IPIP && t->parms.proto != 0) || |
1062 | !ip6_tnl_xmit_ctl(t)) | |
c4d3efaf YK |
1063 | return -1; |
1064 | ||
1065 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1066 | encap_limit = t->parms.encap_limit; | |
1067 | ||
4c9483b2 DM |
1068 | memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6)); |
1069 | fl6.flowi6_proto = IPPROTO_IPIP; | |
c4d3efaf YK |
1070 | |
1071 | dsfield = ipv4_get_dsfield(iph); | |
1072 | ||
d24f22f3 | 1073 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) |
4c9483b2 | 1074 | fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT) |
b77f2fa6 | 1075 | & IPV6_TCLASS_MASK; |
d24f22f3 ED |
1076 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) |
1077 | fl6.flowi6_mark = skb->mark; | |
c4d3efaf | 1078 | |
4c9483b2 | 1079 | err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); |
c4d3efaf YK |
1080 | if (err != 0) { |
1081 | /* XXX: send ICMP error even if DF is not set. */ | |
1082 | if (err == -EMSGSIZE) | |
1083 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, | |
1084 | htonl(mtu)); | |
1085 | return -1; | |
1086 | } | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | ||
61ec2aec YK |
1091 | static inline int |
1092 | ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) | |
1093 | { | |
1094 | struct ip6_tnl *t = netdev_priv(dev); | |
0660e03f | 1095 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
61ec2aec YK |
1096 | int encap_limit = -1; |
1097 | __u16 offset; | |
4c9483b2 | 1098 | struct flowi6 fl6; |
61ec2aec YK |
1099 | __u8 dsfield; |
1100 | __u32 mtu; | |
1101 | int err; | |
1102 | ||
502b0935 YK |
1103 | if ((t->parms.proto != IPPROTO_IPV6 && t->parms.proto != 0) || |
1104 | !ip6_tnl_xmit_ctl(t) || ip6_tnl_addr_conflict(t, ipv6h)) | |
61ec2aec YK |
1105 | return -1; |
1106 | ||
c12b395a | 1107 | offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb)); |
d56f90a7 | 1108 | if (offset > 0) { |
61ec2aec | 1109 | struct ipv6_tlv_tnl_enc_lim *tel; |
d56f90a7 | 1110 | tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset]; |
61ec2aec YK |
1111 | if (tel->encap_limit == 0) { |
1112 | icmpv6_send(skb, ICMPV6_PARAMPROB, | |
3ffe533c | 1113 | ICMPV6_HDR_FIELD, offset + 2); |
61ec2aec YK |
1114 | return -1; |
1115 | } | |
1116 | encap_limit = tel->encap_limit - 1; | |
1117 | } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1118 | encap_limit = t->parms.encap_limit; | |
1119 | ||
4c9483b2 DM |
1120 | memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6)); |
1121 | fl6.flowi6_proto = IPPROTO_IPV6; | |
61ec2aec YK |
1122 | |
1123 | dsfield = ipv6_get_dsfield(ipv6h); | |
d24f22f3 | 1124 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) |
4c9483b2 | 1125 | fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK); |
d24f22f3 | 1126 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) |
4c9483b2 | 1127 | fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK); |
d24f22f3 ED |
1128 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) |
1129 | fl6.flowi6_mark = skb->mark; | |
61ec2aec | 1130 | |
4c9483b2 | 1131 | err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); |
61ec2aec YK |
1132 | if (err != 0) { |
1133 | if (err == -EMSGSIZE) | |
3ffe533c | 1134 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
61ec2aec YK |
1135 | return -1; |
1136 | } | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
6fef4c0c | 1141 | static netdev_tx_t |
61ec2aec YK |
1142 | ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) |
1143 | { | |
1144 | struct ip6_tnl *t = netdev_priv(dev); | |
3dca02af | 1145 | struct net_device_stats *stats = &t->dev->stats; |
61ec2aec YK |
1146 | int ret; |
1147 | ||
61ec2aec | 1148 | switch (skb->protocol) { |
60678040 | 1149 | case htons(ETH_P_IP): |
c4d3efaf YK |
1150 | ret = ip4ip6_tnl_xmit(skb, dev); |
1151 | break; | |
60678040 | 1152 | case htons(ETH_P_IPV6): |
61ec2aec YK |
1153 | ret = ip6ip6_tnl_xmit(skb, dev); |
1154 | break; | |
1155 | default: | |
1156 | goto tx_err; | |
1157 | } | |
1158 | ||
1159 | if (ret < 0) | |
1160 | goto tx_err; | |
1161 | ||
6ed10654 | 1162 | return NETDEV_TX_OK; |
61ec2aec | 1163 | |
1da177e4 LT |
1164 | tx_err: |
1165 | stats->tx_errors++; | |
1166 | stats->tx_dropped++; | |
1167 | kfree_skb(skb); | |
6ed10654 | 1168 | return NETDEV_TX_OK; |
1da177e4 LT |
1169 | } |
1170 | ||
3144581c | 1171 | static void ip6_tnl_link_config(struct ip6_tnl *t) |
1da177e4 LT |
1172 | { |
1173 | struct net_device *dev = t->dev; | |
c12b395a | 1174 | struct __ip6_tnl_parm *p = &t->parms; |
4c9483b2 | 1175 | struct flowi6 *fl6 = &t->fl.u.ip6; |
1da177e4 | 1176 | |
3a6d54c5 JP |
1177 | memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); |
1178 | memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); | |
1da177e4 LT |
1179 | |
1180 | /* Set up flowi template */ | |
4e3fd7a0 AD |
1181 | fl6->saddr = p->laddr; |
1182 | fl6->daddr = p->raddr; | |
4c9483b2 DM |
1183 | fl6->flowi6_oif = p->link; |
1184 | fl6->flowlabel = 0; | |
1da177e4 LT |
1185 | |
1186 | if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS)) | |
4c9483b2 | 1187 | fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo; |
1da177e4 | 1188 | if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL)) |
4c9483b2 | 1189 | fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo; |
1da177e4 | 1190 | |
d0087b29 VN |
1191 | p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET); |
1192 | p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr); | |
1da177e4 LT |
1193 | |
1194 | if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV) | |
1195 | dev->flags |= IFF_POINTOPOINT; | |
1196 | else | |
1197 | dev->flags &= ~IFF_POINTOPOINT; | |
1198 | ||
1199 | dev->iflink = p->link; | |
1200 | ||
1201 | if (p->flags & IP6_TNL_F_CAP_XMIT) { | |
305d4b3c VN |
1202 | int strict = (ipv6_addr_type(&p->raddr) & |
1203 | (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)); | |
1204 | ||
2f7f54b7 PE |
1205 | struct rt6_info *rt = rt6_lookup(dev_net(dev), |
1206 | &p->raddr, &p->laddr, | |
305d4b3c | 1207 | p->link, strict); |
1da177e4 LT |
1208 | |
1209 | if (rt == NULL) | |
1210 | return; | |
1211 | ||
d1918542 DM |
1212 | if (rt->dst.dev) { |
1213 | dev->hard_header_len = rt->dst.dev->hard_header_len + | |
1da177e4 LT |
1214 | sizeof (struct ipv6hdr); |
1215 | ||
d1918542 | 1216 | dev->mtu = rt->dst.dev->mtu - sizeof (struct ipv6hdr); |
381601e5 AF |
1217 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
1218 | dev->mtu-=8; | |
1da177e4 LT |
1219 | |
1220 | if (dev->mtu < IPV6_MIN_MTU) | |
1221 | dev->mtu = IPV6_MIN_MTU; | |
1222 | } | |
94e187c0 | 1223 | ip6_rt_put(rt); |
1da177e4 LT |
1224 | } |
1225 | } | |
1226 | ||
1227 | /** | |
3144581c | 1228 | * ip6_tnl_change - update the tunnel parameters |
1da177e4 LT |
1229 | * @t: tunnel to be changed |
1230 | * @p: tunnel configuration parameters | |
1da177e4 LT |
1231 | * |
1232 | * Description: | |
3144581c | 1233 | * ip6_tnl_change() updates the tunnel parameters |
1da177e4 LT |
1234 | **/ |
1235 | ||
1236 | static int | |
c12b395a | 1237 | ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p) |
1da177e4 | 1238 | { |
4e3fd7a0 AD |
1239 | t->parms.laddr = p->laddr; |
1240 | t->parms.raddr = p->raddr; | |
1da177e4 LT |
1241 | t->parms.flags = p->flags; |
1242 | t->parms.hop_limit = p->hop_limit; | |
1243 | t->parms.encap_limit = p->encap_limit; | |
1244 | t->parms.flowinfo = p->flowinfo; | |
8181b8c1 | 1245 | t->parms.link = p->link; |
502b0935 | 1246 | t->parms.proto = p->proto; |
0c088890 | 1247 | ip6_tnl_dst_reset(t); |
3144581c | 1248 | ip6_tnl_link_config(t); |
1da177e4 LT |
1249 | return 0; |
1250 | } | |
1251 | ||
0b112457 ND |
1252 | static int ip6_tnl_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p) |
1253 | { | |
1254 | struct net *net = dev_net(t->dev); | |
1255 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1256 | int err; | |
1257 | ||
1258 | ip6_tnl_unlink(ip6n, t); | |
1259 | synchronize_net(); | |
1260 | err = ip6_tnl_change(t, p); | |
1261 | ip6_tnl_link(ip6n, t); | |
1262 | netdev_state_change(t->dev); | |
1263 | return err; | |
1264 | } | |
1265 | ||
c12b395a | 1266 | static void |
1267 | ip6_tnl_parm_from_user(struct __ip6_tnl_parm *p, const struct ip6_tnl_parm *u) | |
1268 | { | |
1269 | p->laddr = u->laddr; | |
1270 | p->raddr = u->raddr; | |
1271 | p->flags = u->flags; | |
1272 | p->hop_limit = u->hop_limit; | |
1273 | p->encap_limit = u->encap_limit; | |
1274 | p->flowinfo = u->flowinfo; | |
1275 | p->link = u->link; | |
1276 | p->proto = u->proto; | |
1277 | memcpy(p->name, u->name, sizeof(u->name)); | |
1278 | } | |
1279 | ||
1280 | static void | |
1281 | ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p) | |
1282 | { | |
1283 | u->laddr = p->laddr; | |
1284 | u->raddr = p->raddr; | |
1285 | u->flags = p->flags; | |
1286 | u->hop_limit = p->hop_limit; | |
1287 | u->encap_limit = p->encap_limit; | |
1288 | u->flowinfo = p->flowinfo; | |
1289 | u->link = p->link; | |
1290 | u->proto = p->proto; | |
1291 | memcpy(u->name, p->name, sizeof(u->name)); | |
1292 | } | |
1293 | ||
1da177e4 | 1294 | /** |
3144581c | 1295 | * ip6_tnl_ioctl - configure ipv6 tunnels from userspace |
1da177e4 LT |
1296 | * @dev: virtual device associated with tunnel |
1297 | * @ifr: parameters passed from userspace | |
1298 | * @cmd: command to be performed | |
1299 | * | |
1300 | * Description: | |
3144581c | 1301 | * ip6_tnl_ioctl() is used for managing IPv6 tunnels |
1ab1457c | 1302 | * from userspace. |
1da177e4 LT |
1303 | * |
1304 | * The possible commands are the following: | |
1305 | * %SIOCGETTUNNEL: get tunnel parameters for device | |
1306 | * %SIOCADDTUNNEL: add tunnel matching given tunnel parameters | |
1307 | * %SIOCCHGTUNNEL: change tunnel parameters to those given | |
1308 | * %SIOCDELTUNNEL: delete tunnel | |
1309 | * | |
1ab1457c | 1310 | * The fallback device "ip6tnl0", created during module |
1da177e4 LT |
1311 | * initialization, can be used for creating other tunnel devices. |
1312 | * | |
1313 | * Return: | |
1314 | * 0 on success, | |
1315 | * %-EFAULT if unable to copy data to or from userspace, | |
1316 | * %-EPERM if current process hasn't %CAP_NET_ADMIN set | |
1317 | * %-EINVAL if passed tunnel parameters are invalid, | |
1318 | * %-EEXIST if changing a tunnel's parameters would cause a conflict | |
1319 | * %-ENODEV if attempting to change or delete a nonexisting device | |
1320 | **/ | |
1321 | ||
1322 | static int | |
3144581c | 1323 | ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 LT |
1324 | { |
1325 | int err = 0; | |
1da177e4 | 1326 | struct ip6_tnl_parm p; |
c12b395a | 1327 | struct __ip6_tnl_parm p1; |
1da177e4 | 1328 | struct ip6_tnl *t = NULL; |
2dd02c89 PE |
1329 | struct net *net = dev_net(dev); |
1330 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1da177e4 LT |
1331 | |
1332 | switch (cmd) { | |
1333 | case SIOCGETTUNNEL: | |
15820e12 | 1334 | if (dev == ip6n->fb_tnl_dev) { |
567131a7 | 1335 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) { |
1da177e4 LT |
1336 | err = -EFAULT; |
1337 | break; | |
1338 | } | |
c12b395a | 1339 | ip6_tnl_parm_from_user(&p1, &p); |
1340 | t = ip6_tnl_locate(net, &p1, 0); | |
5ef5d6c5 DC |
1341 | } else { |
1342 | memset(&p, 0, sizeof(p)); | |
567131a7 VN |
1343 | } |
1344 | if (t == NULL) | |
2941a486 | 1345 | t = netdev_priv(dev); |
c12b395a | 1346 | ip6_tnl_parm_to_user(&p, &t->parms); |
1da177e4 LT |
1347 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) { |
1348 | err = -EFAULT; | |
1349 | } | |
1350 | break; | |
1351 | case SIOCADDTUNNEL: | |
1352 | case SIOCCHGTUNNEL: | |
1353 | err = -EPERM; | |
af31f412 | 1354 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 | 1355 | break; |
567131a7 VN |
1356 | err = -EFAULT; |
1357 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) | |
1da177e4 | 1358 | break; |
567131a7 | 1359 | err = -EINVAL; |
502b0935 YK |
1360 | if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP && |
1361 | p.proto != 0) | |
1da177e4 | 1362 | break; |
c12b395a | 1363 | ip6_tnl_parm_from_user(&p1, &p); |
1364 | t = ip6_tnl_locate(net, &p1, cmd == SIOCADDTUNNEL); | |
15820e12 | 1365 | if (dev != ip6n->fb_tnl_dev && cmd == SIOCCHGTUNNEL) { |
567131a7 VN |
1366 | if (t != NULL) { |
1367 | if (t->dev != dev) { | |
1368 | err = -EEXIST; | |
1369 | break; | |
1370 | } | |
1371 | } else | |
1372 | t = netdev_priv(dev); | |
1373 | ||
0b112457 | 1374 | err = ip6_tnl_update(t, &p1); |
1da177e4 | 1375 | } |
567131a7 | 1376 | if (t) { |
1da177e4 | 1377 | err = 0; |
c12b395a | 1378 | ip6_tnl_parm_to_user(&p, &t->parms); |
1379 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) | |
567131a7 VN |
1380 | err = -EFAULT; |
1381 | ||
1382 | } else | |
1383 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); | |
1da177e4 LT |
1384 | break; |
1385 | case SIOCDELTUNNEL: | |
1386 | err = -EPERM; | |
af31f412 | 1387 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1388 | break; |
1389 | ||
15820e12 | 1390 | if (dev == ip6n->fb_tnl_dev) { |
567131a7 VN |
1391 | err = -EFAULT; |
1392 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) | |
1da177e4 | 1393 | break; |
567131a7 | 1394 | err = -ENOENT; |
c12b395a | 1395 | ip6_tnl_parm_from_user(&p1, &p); |
1396 | t = ip6_tnl_locate(net, &p1, 0); | |
1397 | if (t == NULL) | |
1da177e4 | 1398 | break; |
567131a7 | 1399 | err = -EPERM; |
15820e12 | 1400 | if (t->dev == ip6n->fb_tnl_dev) |
1da177e4 | 1401 | break; |
567131a7 | 1402 | dev = t->dev; |
1da177e4 | 1403 | } |
22f8cde5 SH |
1404 | err = 0; |
1405 | unregister_netdevice(dev); | |
1da177e4 LT |
1406 | break; |
1407 | default: | |
1408 | err = -EINVAL; | |
1409 | } | |
1410 | return err; | |
1411 | } | |
1412 | ||
1da177e4 | 1413 | /** |
3144581c | 1414 | * ip6_tnl_change_mtu - change mtu manually for tunnel device |
1da177e4 LT |
1415 | * @dev: virtual device associated with tunnel |
1416 | * @new_mtu: the new mtu | |
1417 | * | |
1418 | * Return: | |
1419 | * 0 on success, | |
1420 | * %-EINVAL if mtu too small | |
1421 | **/ | |
1422 | ||
1423 | static int | |
3144581c | 1424 | ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
1425 | { |
1426 | if (new_mtu < IPV6_MIN_MTU) { | |
1427 | return -EINVAL; | |
1428 | } | |
1429 | dev->mtu = new_mtu; | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1326c3d5 SH |
1433 | |
1434 | static const struct net_device_ops ip6_tnl_netdev_ops = { | |
8560f226 | 1435 | .ndo_uninit = ip6_tnl_dev_uninit, |
1326c3d5 | 1436 | .ndo_start_xmit = ip6_tnl_xmit, |
8560f226 | 1437 | .ndo_do_ioctl = ip6_tnl_ioctl, |
1326c3d5 | 1438 | .ndo_change_mtu = ip6_tnl_change_mtu, |
8560f226 | 1439 | .ndo_get_stats = ip6_get_stats, |
1326c3d5 SH |
1440 | }; |
1441 | ||
8560f226 | 1442 | |
1da177e4 | 1443 | /** |
3144581c | 1444 | * ip6_tnl_dev_setup - setup virtual tunnel device |
1da177e4 LT |
1445 | * @dev: virtual device associated with tunnel |
1446 | * | |
1447 | * Description: | |
1448 | * Initialize function pointers and device parameters | |
1449 | **/ | |
1450 | ||
3144581c | 1451 | static void ip6_tnl_dev_setup(struct net_device *dev) |
1da177e4 | 1452 | { |
381601e5 AF |
1453 | struct ip6_tnl *t; |
1454 | ||
1326c3d5 | 1455 | dev->netdev_ops = &ip6_tnl_netdev_ops; |
8560f226 | 1456 | dev->destructor = ip6_dev_free; |
1da177e4 LT |
1457 | |
1458 | dev->type = ARPHRD_TUNNEL6; | |
1459 | dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr); | |
1460 | dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr); | |
381601e5 AF |
1461 | t = netdev_priv(dev); |
1462 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1463 | dev->mtu-=8; | |
1da177e4 LT |
1464 | dev->flags |= IFF_NOARP; |
1465 | dev->addr_len = sizeof(struct in6_addr); | |
554eb277 | 1466 | dev->features |= NETIF_F_NETNS_LOCAL; |
7e223de8 | 1467 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 LT |
1468 | } |
1469 | ||
1470 | ||
1471 | /** | |
3144581c | 1472 | * ip6_tnl_dev_init_gen - general initializer for all tunnel devices |
1da177e4 LT |
1473 | * @dev: virtual device associated with tunnel |
1474 | **/ | |
1475 | ||
8560f226 | 1476 | static inline int |
3144581c | 1477 | ip6_tnl_dev_init_gen(struct net_device *dev) |
1da177e4 | 1478 | { |
2941a486 | 1479 | struct ip6_tnl *t = netdev_priv(dev); |
8560f226 | 1480 | |
1da177e4 | 1481 | t->dev = dev; |
8560f226 ED |
1482 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1483 | if (!dev->tstats) | |
1484 | return -ENOMEM; | |
1485 | return 0; | |
1da177e4 LT |
1486 | } |
1487 | ||
1488 | /** | |
3144581c | 1489 | * ip6_tnl_dev_init - initializer for all non fallback tunnel devices |
1da177e4 LT |
1490 | * @dev: virtual device associated with tunnel |
1491 | **/ | |
1492 | ||
8560f226 | 1493 | static int ip6_tnl_dev_init(struct net_device *dev) |
1da177e4 | 1494 | { |
2941a486 | 1495 | struct ip6_tnl *t = netdev_priv(dev); |
8560f226 ED |
1496 | int err = ip6_tnl_dev_init_gen(dev); |
1497 | ||
1498 | if (err) | |
1499 | return err; | |
3144581c | 1500 | ip6_tnl_link_config(t); |
8560f226 | 1501 | return 0; |
1da177e4 LT |
1502 | } |
1503 | ||
1504 | /** | |
3144581c | 1505 | * ip6_fb_tnl_dev_init - initializer for fallback tunnel device |
1da177e4 LT |
1506 | * @dev: fallback device |
1507 | * | |
1508 | * Return: 0 | |
1509 | **/ | |
1510 | ||
8560f226 | 1511 | static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev) |
1da177e4 | 1512 | { |
2941a486 | 1513 | struct ip6_tnl *t = netdev_priv(dev); |
3e6c9fb5 PE |
1514 | struct net *net = dev_net(dev); |
1515 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
8560f226 ED |
1516 | int err = ip6_tnl_dev_init_gen(dev); |
1517 | ||
1518 | if (err) | |
1519 | return err; | |
3e6c9fb5 | 1520 | |
502b0935 | 1521 | t->parms.proto = IPPROTO_IPV6; |
1da177e4 | 1522 | dev_hold(dev); |
d0087b29 VN |
1523 | |
1524 | ip6_tnl_link_config(t); | |
1525 | ||
cf778b00 | 1526 | rcu_assign_pointer(ip6n->tnls_wc[0], t); |
8560f226 | 1527 | return 0; |
1da177e4 LT |
1528 | } |
1529 | ||
0b112457 ND |
1530 | static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[]) |
1531 | { | |
1532 | u8 proto; | |
1533 | ||
1534 | if (!data) | |
1535 | return 0; | |
1536 | ||
1537 | proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
1538 | if (proto != IPPROTO_IPV6 && | |
1539 | proto != IPPROTO_IPIP && | |
1540 | proto != 0) | |
1541 | return -EINVAL; | |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | static void ip6_tnl_netlink_parms(struct nlattr *data[], | |
1547 | struct __ip6_tnl_parm *parms) | |
1548 | { | |
1549 | memset(parms, 0, sizeof(*parms)); | |
1550 | ||
1551 | if (!data) | |
1552 | return; | |
1553 | ||
1554 | if (data[IFLA_IPTUN_LINK]) | |
1555 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); | |
1556 | ||
1557 | if (data[IFLA_IPTUN_LOCAL]) | |
1558 | nla_memcpy(&parms->laddr, data[IFLA_IPTUN_LOCAL], | |
1559 | sizeof(struct in6_addr)); | |
1560 | ||
1561 | if (data[IFLA_IPTUN_REMOTE]) | |
1562 | nla_memcpy(&parms->raddr, data[IFLA_IPTUN_REMOTE], | |
1563 | sizeof(struct in6_addr)); | |
1564 | ||
1565 | if (data[IFLA_IPTUN_TTL]) | |
1566 | parms->hop_limit = nla_get_u8(data[IFLA_IPTUN_TTL]); | |
1567 | ||
1568 | if (data[IFLA_IPTUN_ENCAP_LIMIT]) | |
1569 | parms->encap_limit = nla_get_u8(data[IFLA_IPTUN_ENCAP_LIMIT]); | |
1570 | ||
1571 | if (data[IFLA_IPTUN_FLOWINFO]) | |
1ff05fb7 | 1572 | parms->flowinfo = nla_get_be32(data[IFLA_IPTUN_FLOWINFO]); |
0b112457 ND |
1573 | |
1574 | if (data[IFLA_IPTUN_FLAGS]) | |
1575 | parms->flags = nla_get_u32(data[IFLA_IPTUN_FLAGS]); | |
1576 | ||
1577 | if (data[IFLA_IPTUN_PROTO]) | |
1578 | parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
1579 | } | |
1580 | ||
1581 | static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev, | |
1582 | struct nlattr *tb[], struct nlattr *data[]) | |
1583 | { | |
1584 | struct net *net = dev_net(dev); | |
1585 | struct ip6_tnl *nt; | |
1586 | ||
1587 | nt = netdev_priv(dev); | |
1588 | ip6_tnl_netlink_parms(data, &nt->parms); | |
1589 | ||
1590 | if (ip6_tnl_locate(net, &nt->parms, 0)) | |
1591 | return -EEXIST; | |
1592 | ||
1593 | return ip6_tnl_create2(dev); | |
1594 | } | |
1595 | ||
1596 | static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[], | |
1597 | struct nlattr *data[]) | |
1598 | { | |
1599 | struct ip6_tnl *t; | |
1600 | struct __ip6_tnl_parm p; | |
1601 | struct net *net = dev_net(dev); | |
1602 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); | |
1603 | ||
1604 | if (dev == ip6n->fb_tnl_dev) | |
1605 | return -EINVAL; | |
1606 | ||
1607 | ip6_tnl_netlink_parms(data, &p); | |
1608 | ||
1609 | t = ip6_tnl_locate(net, &p, 0); | |
1610 | ||
1611 | if (t) { | |
1612 | if (t->dev != dev) | |
1613 | return -EEXIST; | |
1614 | } else | |
1615 | t = netdev_priv(dev); | |
1616 | ||
1617 | return ip6_tnl_update(t, &p); | |
1618 | } | |
1619 | ||
b58d731a | 1620 | static size_t ip6_tnl_get_size(const struct net_device *dev) |
c075b130 ND |
1621 | { |
1622 | return | |
1623 | /* IFLA_IPTUN_LINK */ | |
1624 | nla_total_size(4) + | |
1625 | /* IFLA_IPTUN_LOCAL */ | |
1626 | nla_total_size(sizeof(struct in6_addr)) + | |
1627 | /* IFLA_IPTUN_REMOTE */ | |
1628 | nla_total_size(sizeof(struct in6_addr)) + | |
1629 | /* IFLA_IPTUN_TTL */ | |
1630 | nla_total_size(1) + | |
1631 | /* IFLA_IPTUN_ENCAP_LIMIT */ | |
1632 | nla_total_size(1) + | |
1633 | /* IFLA_IPTUN_FLOWINFO */ | |
1634 | nla_total_size(4) + | |
1635 | /* IFLA_IPTUN_FLAGS */ | |
1636 | nla_total_size(4) + | |
cfa323b6 ND |
1637 | /* IFLA_IPTUN_PROTO */ |
1638 | nla_total_size(1) + | |
c075b130 ND |
1639 | 0; |
1640 | } | |
1641 | ||
b58d731a | 1642 | static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev) |
c075b130 ND |
1643 | { |
1644 | struct ip6_tnl *tunnel = netdev_priv(dev); | |
1645 | struct __ip6_tnl_parm *parm = &tunnel->parms; | |
1646 | ||
1647 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || | |
1648 | nla_put(skb, IFLA_IPTUN_LOCAL, sizeof(struct in6_addr), | |
1649 | &parm->raddr) || | |
1650 | nla_put(skb, IFLA_IPTUN_REMOTE, sizeof(struct in6_addr), | |
1651 | &parm->laddr) || | |
1652 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->hop_limit) || | |
1653 | nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) || | |
1654 | nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) || | |
cfa323b6 ND |
1655 | nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) || |
1656 | nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto)) | |
c075b130 ND |
1657 | goto nla_put_failure; |
1658 | return 0; | |
1659 | ||
1660 | nla_put_failure: | |
1661 | return -EMSGSIZE; | |
1662 | } | |
1663 | ||
0b112457 ND |
1664 | static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = { |
1665 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, | |
1666 | [IFLA_IPTUN_LOCAL] = { .len = sizeof(struct in6_addr) }, | |
1667 | [IFLA_IPTUN_REMOTE] = { .len = sizeof(struct in6_addr) }, | |
1668 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, | |
1669 | [IFLA_IPTUN_ENCAP_LIMIT] = { .type = NLA_U8 }, | |
1670 | [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 }, | |
1671 | [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 }, | |
1672 | [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, | |
1673 | }; | |
1674 | ||
c075b130 ND |
1675 | static struct rtnl_link_ops ip6_link_ops __read_mostly = { |
1676 | .kind = "ip6tnl", | |
1677 | .maxtype = IFLA_IPTUN_MAX, | |
0b112457 | 1678 | .policy = ip6_tnl_policy, |
c075b130 | 1679 | .priv_size = sizeof(struct ip6_tnl), |
0b112457 ND |
1680 | .setup = ip6_tnl_dev_setup, |
1681 | .validate = ip6_tnl_validate, | |
1682 | .newlink = ip6_tnl_newlink, | |
1683 | .changelink = ip6_tnl_changelink, | |
b58d731a ND |
1684 | .get_size = ip6_tnl_get_size, |
1685 | .fill_info = ip6_tnl_fill_info, | |
c075b130 ND |
1686 | }; |
1687 | ||
3ff2cfa5 | 1688 | static struct xfrm6_tunnel ip4ip6_handler __read_mostly = { |
c4d3efaf YK |
1689 | .handler = ip4ip6_rcv, |
1690 | .err_handler = ip4ip6_err, | |
1691 | .priority = 1, | |
1692 | }; | |
1693 | ||
3ff2cfa5 | 1694 | static struct xfrm6_tunnel ip6ip6_handler __read_mostly = { |
0303770d PM |
1695 | .handler = ip6ip6_rcv, |
1696 | .err_handler = ip6ip6_err, | |
d2acc347 | 1697 | .priority = 1, |
1da177e4 LT |
1698 | }; |
1699 | ||
2c8c1e72 | 1700 | static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n) |
3e6c9fb5 PE |
1701 | { |
1702 | int h; | |
1703 | struct ip6_tnl *t; | |
cf4432f5 | 1704 | LIST_HEAD(list); |
3e6c9fb5 PE |
1705 | |
1706 | for (h = 0; h < HASH_SIZE; h++) { | |
94767632 | 1707 | t = rtnl_dereference(ip6n->tnls_r_l[h]); |
cf4432f5 ED |
1708 | while (t != NULL) { |
1709 | unregister_netdevice_queue(t->dev, &list); | |
94767632 | 1710 | t = rtnl_dereference(t->next); |
cf4432f5 | 1711 | } |
3e6c9fb5 PE |
1712 | } |
1713 | ||
94767632 | 1714 | t = rtnl_dereference(ip6n->tnls_wc[0]); |
cf4432f5 ED |
1715 | unregister_netdevice_queue(t->dev, &list); |
1716 | unregister_netdevice_many(&list); | |
3e6c9fb5 PE |
1717 | } |
1718 | ||
2c8c1e72 | 1719 | static int __net_init ip6_tnl_init_net(struct net *net) |
13eeb8e9 | 1720 | { |
ac31cd3c | 1721 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
731abb9c | 1722 | struct ip6_tnl *t = NULL; |
13eeb8e9 | 1723 | int err; |
13eeb8e9 | 1724 | |
3e6c9fb5 PE |
1725 | ip6n->tnls[0] = ip6n->tnls_wc; |
1726 | ip6n->tnls[1] = ip6n->tnls_r_l; | |
1727 | ||
15820e12 PE |
1728 | err = -ENOMEM; |
1729 | ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0", | |
1730 | ip6_tnl_dev_setup); | |
1731 | ||
1732 | if (!ip6n->fb_tnl_dev) | |
1733 | goto err_alloc_dev; | |
be77e593 | 1734 | dev_net_set(ip6n->fb_tnl_dev, net); |
15820e12 | 1735 | |
8560f226 ED |
1736 | err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev); |
1737 | if (err < 0) | |
1738 | goto err_register; | |
15820e12 PE |
1739 | |
1740 | err = register_netdev(ip6n->fb_tnl_dev); | |
1741 | if (err < 0) | |
1742 | goto err_register; | |
731abb9c JB |
1743 | |
1744 | t = netdev_priv(ip6n->fb_tnl_dev); | |
1745 | ||
1746 | strcpy(t->parms.name, ip6n->fb_tnl_dev->name); | |
13eeb8e9 PE |
1747 | return 0; |
1748 | ||
15820e12 | 1749 | err_register: |
8560f226 | 1750 | ip6_dev_free(ip6n->fb_tnl_dev); |
15820e12 | 1751 | err_alloc_dev: |
13eeb8e9 PE |
1752 | return err; |
1753 | } | |
1754 | ||
2c8c1e72 | 1755 | static void __net_exit ip6_tnl_exit_net(struct net *net) |
13eeb8e9 | 1756 | { |
ac31cd3c | 1757 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
13eeb8e9 | 1758 | |
3e6c9fb5 PE |
1759 | rtnl_lock(); |
1760 | ip6_tnl_destroy_tunnels(ip6n); | |
1761 | rtnl_unlock(); | |
13eeb8e9 PE |
1762 | } |
1763 | ||
1764 | static struct pernet_operations ip6_tnl_net_ops = { | |
1765 | .init = ip6_tnl_init_net, | |
1766 | .exit = ip6_tnl_exit_net, | |
ac31cd3c EB |
1767 | .id = &ip6_tnl_net_id, |
1768 | .size = sizeof(struct ip6_tnl_net), | |
13eeb8e9 PE |
1769 | }; |
1770 | ||
1da177e4 LT |
1771 | /** |
1772 | * ip6_tunnel_init - register protocol and reserve needed resources | |
1773 | * | |
1774 | * Return: 0 on success | |
1775 | **/ | |
1776 | ||
1777 | static int __init ip6_tunnel_init(void) | |
1778 | { | |
1779 | int err; | |
1780 | ||
d5aa407f AD |
1781 | err = register_pernet_device(&ip6_tnl_net_ops); |
1782 | if (err < 0) | |
1783 | goto out_pernet; | |
1784 | ||
1785 | err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET); | |
1786 | if (err < 0) { | |
f3213831 | 1787 | pr_err("%s: can't register ip4ip6\n", __func__); |
d5aa407f | 1788 | goto out_ip4ip6; |
c4d3efaf YK |
1789 | } |
1790 | ||
d5aa407f AD |
1791 | err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6); |
1792 | if (err < 0) { | |
f3213831 | 1793 | pr_err("%s: can't register ip6ip6\n", __func__); |
d5aa407f | 1794 | goto out_ip6ip6; |
1da177e4 | 1795 | } |
c075b130 ND |
1796 | err = rtnl_link_register(&ip6_link_ops); |
1797 | if (err < 0) | |
1798 | goto rtnl_link_failed; | |
13eeb8e9 | 1799 | |
1da177e4 | 1800 | return 0; |
d5aa407f | 1801 | |
c075b130 ND |
1802 | rtnl_link_failed: |
1803 | xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6); | |
d5aa407f | 1804 | out_ip6ip6: |
c4d3efaf | 1805 | xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET); |
d5aa407f AD |
1806 | out_ip4ip6: |
1807 | unregister_pernet_device(&ip6_tnl_net_ops); | |
1808 | out_pernet: | |
1da177e4 LT |
1809 | return err; |
1810 | } | |
1811 | ||
1812 | /** | |
1813 | * ip6_tunnel_cleanup - free resources and unregister protocol | |
1814 | **/ | |
1815 | ||
1816 | static void __exit ip6_tunnel_cleanup(void) | |
1817 | { | |
c075b130 | 1818 | rtnl_link_unregister(&ip6_link_ops); |
c4d3efaf | 1819 | if (xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET)) |
f3213831 | 1820 | pr_info("%s: can't deregister ip4ip6\n", __func__); |
c4d3efaf | 1821 | |
73d605d1 | 1822 | if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6)) |
f3213831 | 1823 | pr_info("%s: can't deregister ip6ip6\n", __func__); |
1da177e4 | 1824 | |
ac31cd3c | 1825 | unregister_pernet_device(&ip6_tnl_net_ops); |
1da177e4 LT |
1826 | } |
1827 | ||
1828 | module_init(ip6_tunnel_init); | |
1829 | module_exit(ip6_tunnel_cleanup); |