Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPv6 over IPv4 tunnel device - Simple Internet Transition (SIT) | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | * Changes: | |
15 | * Roger Venning <r.venning@telstra.com>: 6to4 support | |
16 | * Nate Thompson <nate@thebog.net>: 6to4 support | |
fadf6bf0 | 17 | * Fred Templin <fred.l.templin@boeing.com>: isatap support |
1da177e4 LT |
18 | */ |
19 | ||
f3213831 JP |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
1da177e4 | 22 | #include <linux/module.h> |
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/icmp.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <asm/uaccess.h> |
35 | #include <linux/init.h> | |
36 | #include <linux/netfilter_ipv4.h> | |
46f25dff | 37 | #include <linux/if_ether.h> |
1da177e4 LT |
38 | |
39 | #include <net/sock.h> | |
40 | #include <net/snmp.h> | |
41 | ||
42 | #include <net/ipv6.h> | |
43 | #include <net/protocol.h> | |
44 | #include <net/transp_v6.h> | |
45 | #include <net/ip6_fib.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/ndisc.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/icmp.h> | |
52 | #include <net/ipip.h> | |
53 | #include <net/inet_ecn.h> | |
54 | #include <net/xfrm.h> | |
55 | #include <net/dsfield.h> | |
8190d900 PE |
56 | #include <net/net_namespace.h> |
57 | #include <net/netns/generic.h> | |
1da177e4 LT |
58 | |
59 | /* | |
60 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c | |
61 | ||
62 | For comments look at net/ipv4/ip_gre.c --ANK | |
63 | */ | |
64 | ||
65 | #define HASH_SIZE 16 | |
e69a4adc | 66 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
1da177e4 | 67 | |
f4e0b4c5 ND |
68 | static bool log_ecn_error = true; |
69 | module_param(log_ecn_error, bool, 0644); | |
70 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
71 | ||
15fc1f70 | 72 | static int ipip6_tunnel_init(struct net_device *dev); |
1da177e4 | 73 | static void ipip6_tunnel_setup(struct net_device *dev); |
15fc1f70 | 74 | static void ipip6_dev_free(struct net_device *dev); |
ba3e3f50 | 75 | static struct rtnl_link_ops sit_link_ops __read_mostly; |
1da177e4 | 76 | |
f99189b1 | 77 | static int sit_net_id __read_mostly; |
8190d900 | 78 | struct sit_net { |
3a43be3c ED |
79 | struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE]; |
80 | struct ip_tunnel __rcu *tunnels_r[HASH_SIZE]; | |
81 | struct ip_tunnel __rcu *tunnels_l[HASH_SIZE]; | |
82 | struct ip_tunnel __rcu *tunnels_wc[1]; | |
83 | struct ip_tunnel __rcu **tunnels[4]; | |
29182176 | 84 | |
cd3dbc19 | 85 | struct net_device *fb_tunnel_dev; |
8190d900 PE |
86 | }; |
87 | ||
87b6d218 | 88 | static struct rtnl_link_stats64 *ipip6_get_stats64(struct net_device *dev, |
89 | struct rtnl_link_stats64 *tot) | |
15fc1f70 | 90 | { |
15fc1f70 ED |
91 | int i; |
92 | ||
93 | for_each_possible_cpu(i) { | |
94 | const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); | |
87b6d218 | 95 | u64 rx_packets, rx_bytes, tx_packets, tx_bytes; |
96 | unsigned int start; | |
97 | ||
98 | do { | |
99 | start = u64_stats_fetch_begin_bh(&tstats->syncp); | |
100 | rx_packets = tstats->rx_packets; | |
101 | tx_packets = tstats->tx_packets; | |
102 | rx_bytes = tstats->rx_bytes; | |
103 | tx_bytes = tstats->tx_bytes; | |
104 | } while (u64_stats_fetch_retry_bh(&tstats->syncp, start)); | |
105 | ||
106 | tot->rx_packets += rx_packets; | |
107 | tot->tx_packets += tx_packets; | |
108 | tot->rx_bytes += rx_bytes; | |
109 | tot->tx_bytes += tx_bytes; | |
15fc1f70 | 110 | } |
87b6d218 | 111 | |
112 | tot->rx_errors = dev->stats.rx_errors; | |
f4e0b4c5 | 113 | tot->rx_frame_errors = dev->stats.rx_frame_errors; |
87b6d218 | 114 | tot->tx_fifo_errors = dev->stats.tx_fifo_errors; |
115 | tot->tx_carrier_errors = dev->stats.tx_carrier_errors; | |
116 | tot->tx_dropped = dev->stats.tx_dropped; | |
117 | tot->tx_aborted_errors = dev->stats.tx_aborted_errors; | |
118 | tot->tx_errors = dev->stats.tx_errors; | |
119 | ||
120 | return tot; | |
15fc1f70 | 121 | } |
87b6d218 | 122 | |
4543c10d ED |
123 | /* |
124 | * Must be invoked with rcu_read_lock | |
125 | */ | |
3e866703 | 126 | static struct ip_tunnel *ipip6_tunnel_lookup(struct net *net, |
4fddbf5d | 127 | struct net_device *dev, __be32 remote, __be32 local) |
1da177e4 | 128 | { |
3a43be3c ED |
129 | unsigned int h0 = HASH(remote); |
130 | unsigned int h1 = HASH(local); | |
1da177e4 | 131 | struct ip_tunnel *t; |
29182176 | 132 | struct sit_net *sitn = net_generic(net, sit_net_id); |
1da177e4 | 133 | |
e086cadc | 134 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r_l[h0 ^ h1]) { |
1da177e4 | 135 | if (local == t->parms.iph.saddr && |
4fddbf5d SH |
136 | remote == t->parms.iph.daddr && |
137 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && | |
138 | (t->dev->flags & IFF_UP)) | |
1da177e4 LT |
139 | return t; |
140 | } | |
e086cadc | 141 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r[h0]) { |
4fddbf5d SH |
142 | if (remote == t->parms.iph.daddr && |
143 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && | |
144 | (t->dev->flags & IFF_UP)) | |
1da177e4 LT |
145 | return t; |
146 | } | |
e086cadc | 147 | for_each_ip_tunnel_rcu(t, sitn->tunnels_l[h1]) { |
4fddbf5d SH |
148 | if (local == t->parms.iph.saddr && |
149 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && | |
150 | (t->dev->flags & IFF_UP)) | |
1da177e4 LT |
151 | return t; |
152 | } | |
4543c10d | 153 | t = rcu_dereference(sitn->tunnels_wc[0]); |
4fddbf5d | 154 | if ((t != NULL) && (t->dev->flags & IFF_UP)) |
1da177e4 LT |
155 | return t; |
156 | return NULL; | |
157 | } | |
158 | ||
3a43be3c | 159 | static struct ip_tunnel __rcu **__ipip6_bucket(struct sit_net *sitn, |
ca8def14 | 160 | struct ip_tunnel_parm *parms) |
1da177e4 | 161 | { |
420fe234 YH |
162 | __be32 remote = parms->iph.daddr; |
163 | __be32 local = parms->iph.saddr; | |
3a43be3c | 164 | unsigned int h = 0; |
1da177e4 LT |
165 | int prio = 0; |
166 | ||
167 | if (remote) { | |
168 | prio |= 2; | |
169 | h ^= HASH(remote); | |
170 | } | |
171 | if (local) { | |
172 | prio |= 1; | |
173 | h ^= HASH(local); | |
174 | } | |
29182176 | 175 | return &sitn->tunnels[prio][h]; |
1da177e4 LT |
176 | } |
177 | ||
3a43be3c | 178 | static inline struct ip_tunnel __rcu **ipip6_bucket(struct sit_net *sitn, |
ca8def14 | 179 | struct ip_tunnel *t) |
420fe234 | 180 | { |
ca8def14 | 181 | return __ipip6_bucket(sitn, &t->parms); |
420fe234 YH |
182 | } |
183 | ||
ca8def14 | 184 | static void ipip6_tunnel_unlink(struct sit_net *sitn, struct ip_tunnel *t) |
1da177e4 | 185 | { |
3a43be3c ED |
186 | struct ip_tunnel __rcu **tp; |
187 | struct ip_tunnel *iter; | |
188 | ||
189 | for (tp = ipip6_bucket(sitn, t); | |
190 | (iter = rtnl_dereference(*tp)) != NULL; | |
191 | tp = &iter->next) { | |
192 | if (t == iter) { | |
cf778b00 | 193 | rcu_assign_pointer(*tp, t->next); |
1da177e4 LT |
194 | break; |
195 | } | |
196 | } | |
197 | } | |
198 | ||
ca8def14 | 199 | static void ipip6_tunnel_link(struct sit_net *sitn, struct ip_tunnel *t) |
1da177e4 | 200 | { |
3a43be3c | 201 | struct ip_tunnel __rcu **tp = ipip6_bucket(sitn, t); |
1da177e4 | 202 | |
cf778b00 ED |
203 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); |
204 | rcu_assign_pointer(*tp, t); | |
1da177e4 LT |
205 | } |
206 | ||
e0c93948 | 207 | static void ipip6_tunnel_clone_6rd(struct net_device *dev, struct sit_net *sitn) |
fa857afc YH |
208 | { |
209 | #ifdef CONFIG_IPV6_SIT_6RD | |
e0c93948 YH |
210 | struct ip_tunnel *t = netdev_priv(dev); |
211 | ||
fa857afc YH |
212 | if (t->dev == sitn->fb_tunnel_dev) { |
213 | ipv6_addr_set(&t->ip6rd.prefix, htonl(0x20020000), 0, 0, 0); | |
214 | t->ip6rd.relay_prefix = 0; | |
215 | t->ip6rd.prefixlen = 16; | |
216 | t->ip6rd.relay_prefixlen = 0; | |
217 | } else { | |
218 | struct ip_tunnel *t0 = netdev_priv(sitn->fb_tunnel_dev); | |
219 | memcpy(&t->ip6rd, &t0->ip6rd, sizeof(t->ip6rd)); | |
220 | } | |
221 | #endif | |
222 | } | |
223 | ||
f3723416 ND |
224 | static int ipip6_tunnel_create(struct net_device *dev) |
225 | { | |
226 | struct ip_tunnel *t = netdev_priv(dev); | |
227 | struct net *net = dev_net(dev); | |
228 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
229 | int err; | |
230 | ||
231 | err = ipip6_tunnel_init(dev); | |
232 | if (err < 0) | |
233 | goto out; | |
234 | ipip6_tunnel_clone_6rd(dev, sitn); | |
235 | ||
d440b720 | 236 | if ((__force u16)t->parms.i_flags & SIT_ISATAP) |
f3723416 ND |
237 | dev->priv_flags |= IFF_ISATAP; |
238 | ||
239 | err = register_netdevice(dev); | |
240 | if (err < 0) | |
241 | goto out; | |
242 | ||
243 | strcpy(t->parms.name, dev->name); | |
244 | dev->rtnl_link_ops = &sit_link_ops; | |
245 | ||
246 | dev_hold(dev); | |
247 | ||
248 | ipip6_tunnel_link(sitn, t); | |
249 | return 0; | |
250 | ||
251 | out: | |
252 | return err; | |
253 | } | |
254 | ||
3a43be3c | 255 | static struct ip_tunnel *ipip6_tunnel_locate(struct net *net, |
ca8def14 | 256 | struct ip_tunnel_parm *parms, int create) |
1da177e4 | 257 | { |
e69a4adc AV |
258 | __be32 remote = parms->iph.daddr; |
259 | __be32 local = parms->iph.saddr; | |
3a43be3c ED |
260 | struct ip_tunnel *t, *nt; |
261 | struct ip_tunnel __rcu **tp; | |
1da177e4 | 262 | struct net_device *dev; |
1da177e4 | 263 | char name[IFNAMSIZ]; |
ca8def14 | 264 | struct sit_net *sitn = net_generic(net, sit_net_id); |
1da177e4 | 265 | |
3a43be3c ED |
266 | for (tp = __ipip6_bucket(sitn, parms); |
267 | (t = rtnl_dereference(*tp)) != NULL; | |
268 | tp = &t->next) { | |
8db99e57 | 269 | if (local == t->parms.iph.saddr && |
4fddbf5d SH |
270 | remote == t->parms.iph.daddr && |
271 | parms->link == t->parms.link) { | |
8db99e57 SH |
272 | if (create) |
273 | return NULL; | |
274 | else | |
275 | return t; | |
276 | } | |
1da177e4 LT |
277 | } |
278 | if (!create) | |
279 | goto failed; | |
280 | ||
281 | if (parms->name[0]) | |
282 | strlcpy(name, parms->name, IFNAMSIZ); | |
34cc7ba6 | 283 | else |
15fc1f70 | 284 | strcpy(name, "sit%d"); |
1da177e4 LT |
285 | |
286 | dev = alloc_netdev(sizeof(*t), name, ipip6_tunnel_setup); | |
287 | if (dev == NULL) | |
288 | return NULL; | |
289 | ||
7a97146c PE |
290 | dev_net_set(dev, net); |
291 | ||
2941a486 | 292 | nt = netdev_priv(dev); |
1326c3d5 | 293 | |
1da177e4 | 294 | nt->parms = *parms; |
f3723416 | 295 | if (ipip6_tunnel_create(dev) < 0) |
b37d428b | 296 | goto failed_free; |
1da177e4 | 297 | |
1da177e4 LT |
298 | return nt; |
299 | ||
b37d428b | 300 | failed_free: |
15fc1f70 | 301 | ipip6_dev_free(dev); |
1da177e4 LT |
302 | failed: |
303 | return NULL; | |
304 | } | |
305 | ||
ef9a9d11 ED |
306 | #define for_each_prl_rcu(start) \ |
307 | for (prl = rcu_dereference(start); \ | |
308 | prl; \ | |
309 | prl = rcu_dereference(prl->next)) | |
310 | ||
fadf6bf0 | 311 | static struct ip_tunnel_prl_entry * |
3fcfa129 | 312 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
fadf6bf0 | 313 | { |
ef9a9d11 | 314 | struct ip_tunnel_prl_entry *prl; |
fadf6bf0 | 315 | |
ef9a9d11 ED |
316 | for_each_prl_rcu(t->prl) |
317 | if (prl->addr == addr) | |
fadf6bf0 | 318 | break; |
ef9a9d11 | 319 | return prl; |
fadf6bf0 TF |
320 | |
321 | } | |
322 | ||
2b4743bd YH |
323 | static int ipip6_tunnel_get_prl(struct ip_tunnel *t, |
324 | struct ip_tunnel_prl __user *a) | |
300aaeea | 325 | { |
2b4743bd | 326 | struct ip_tunnel_prl kprl, *kp; |
300aaeea YH |
327 | struct ip_tunnel_prl_entry *prl; |
328 | unsigned int cmax, c = 0, ca, len; | |
329 | int ret = 0; | |
330 | ||
2b4743bd YH |
331 | if (copy_from_user(&kprl, a, sizeof(kprl))) |
332 | return -EFAULT; | |
333 | cmax = kprl.datalen / sizeof(kprl); | |
334 | if (cmax > 1 && kprl.addr != htonl(INADDR_ANY)) | |
300aaeea YH |
335 | cmax = 1; |
336 | ||
337 | /* For simple GET or for root users, | |
338 | * we try harder to allocate. | |
339 | */ | |
340 | kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ? | |
341 | kcalloc(cmax, sizeof(*kp), GFP_KERNEL) : | |
342 | NULL; | |
343 | ||
ef9a9d11 | 344 | rcu_read_lock(); |
300aaeea YH |
345 | |
346 | ca = t->prl_count < cmax ? t->prl_count : cmax; | |
347 | ||
348 | if (!kp) { | |
349 | /* We don't try hard to allocate much memory for | |
350 | * non-root users. | |
351 | * For root users, retry allocating enough memory for | |
352 | * the answer. | |
353 | */ | |
354 | kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC); | |
355 | if (!kp) { | |
356 | ret = -ENOMEM; | |
357 | goto out; | |
358 | } | |
359 | } | |
360 | ||
361 | c = 0; | |
ef9a9d11 | 362 | for_each_prl_rcu(t->prl) { |
298bf12d | 363 | if (c >= cmax) |
300aaeea | 364 | break; |
2b4743bd | 365 | if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr) |
300aaeea YH |
366 | continue; |
367 | kp[c].addr = prl->addr; | |
368 | kp[c].flags = prl->flags; | |
369 | c++; | |
2b4743bd | 370 | if (kprl.addr != htonl(INADDR_ANY)) |
300aaeea YH |
371 | break; |
372 | } | |
373 | out: | |
ef9a9d11 | 374 | rcu_read_unlock(); |
300aaeea YH |
375 | |
376 | len = sizeof(*kp) * c; | |
2b4743bd YH |
377 | ret = 0; |
378 | if ((len && copy_to_user(a + 1, kp, len)) || put_user(len, &a->datalen)) | |
379 | ret = -EFAULT; | |
300aaeea YH |
380 | |
381 | kfree(kp); | |
300aaeea | 382 | |
2b4743bd | 383 | return ret; |
300aaeea YH |
384 | } |
385 | ||
fadf6bf0 TF |
386 | static int |
387 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) | |
388 | { | |
389 | struct ip_tunnel_prl_entry *p; | |
3fcfa129 YH |
390 | int err = 0; |
391 | ||
0009ae1f YH |
392 | if (a->addr == htonl(INADDR_ANY)) |
393 | return -EINVAL; | |
394 | ||
aac4dddc | 395 | ASSERT_RTNL(); |
fadf6bf0 | 396 | |
3a43be3c | 397 | for (p = rtnl_dereference(t->prl); p; p = rtnl_dereference(p->next)) { |
300aaeea | 398 | if (p->addr == a->addr) { |
ef9a9d11 ED |
399 | if (chg) { |
400 | p->flags = a->flags; | |
401 | goto out; | |
402 | } | |
3fcfa129 YH |
403 | err = -EEXIST; |
404 | goto out; | |
fadf6bf0 TF |
405 | } |
406 | } | |
407 | ||
3fcfa129 YH |
408 | if (chg) { |
409 | err = -ENXIO; | |
410 | goto out; | |
411 | } | |
fadf6bf0 TF |
412 | |
413 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); | |
3fcfa129 YH |
414 | if (!p) { |
415 | err = -ENOBUFS; | |
416 | goto out; | |
417 | } | |
fadf6bf0 | 418 | |
fadf6bf0 | 419 | p->next = t->prl; |
300aaeea YH |
420 | p->addr = a->addr; |
421 | p->flags = a->flags; | |
ef9a9d11 | 422 | t->prl_count++; |
cf778b00 | 423 | rcu_assign_pointer(t->prl, p); |
3fcfa129 | 424 | out: |
3fcfa129 | 425 | return err; |
fadf6bf0 TF |
426 | } |
427 | ||
ef9a9d11 ED |
428 | static void prl_list_destroy_rcu(struct rcu_head *head) |
429 | { | |
430 | struct ip_tunnel_prl_entry *p, *n; | |
431 | ||
432 | p = container_of(head, struct ip_tunnel_prl_entry, rcu_head); | |
433 | do { | |
753ea8e9 | 434 | n = rcu_dereference_protected(p->next, 1); |
ef9a9d11 ED |
435 | kfree(p); |
436 | p = n; | |
437 | } while (p); | |
438 | } | |
439 | ||
fadf6bf0 TF |
440 | static int |
441 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) | |
442 | { | |
753ea8e9 ED |
443 | struct ip_tunnel_prl_entry *x; |
444 | struct ip_tunnel_prl_entry __rcu **p; | |
3fcfa129 YH |
445 | int err = 0; |
446 | ||
aac4dddc | 447 | ASSERT_RTNL(); |
fadf6bf0 | 448 | |
0009ae1f | 449 | if (a && a->addr != htonl(INADDR_ANY)) { |
753ea8e9 ED |
450 | for (p = &t->prl; |
451 | (x = rtnl_dereference(*p)) != NULL; | |
452 | p = &x->next) { | |
453 | if (x->addr == a->addr) { | |
fadf6bf0 | 454 | *p = x->next; |
11c476f3 | 455 | kfree_rcu(x, rcu_head); |
300aaeea | 456 | t->prl_count--; |
3fcfa129 | 457 | goto out; |
fadf6bf0 TF |
458 | } |
459 | } | |
3fcfa129 | 460 | err = -ENXIO; |
fadf6bf0 | 461 | } else { |
753ea8e9 ED |
462 | x = rtnl_dereference(t->prl); |
463 | if (x) { | |
ef9a9d11 | 464 | t->prl_count = 0; |
ef9a9d11 ED |
465 | call_rcu(&x->rcu_head, prl_list_destroy_rcu); |
466 | t->prl = NULL; | |
fadf6bf0 TF |
467 | } |
468 | } | |
3fcfa129 | 469 | out: |
4b279601 | 470 | return err; |
fadf6bf0 TF |
471 | } |
472 | ||
fadf6bf0 | 473 | static int |
b71d1d42 | 474 | isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t) |
fadf6bf0 | 475 | { |
3fcfa129 | 476 | struct ip_tunnel_prl_entry *p; |
fadf6bf0 TF |
477 | int ok = 1; |
478 | ||
ef9a9d11 | 479 | rcu_read_lock(); |
3fcfa129 | 480 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); |
fadf6bf0 | 481 | if (p) { |
300aaeea | 482 | if (p->flags & PRL_DEFAULT) |
fadf6bf0 TF |
483 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; |
484 | else | |
485 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; | |
486 | } else { | |
b71d1d42 ED |
487 | const struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; |
488 | ||
fadf6bf0 TF |
489 | if (ipv6_addr_is_isatap(addr6) && |
490 | (addr6->s6_addr32[3] == iph->saddr) && | |
52eeeb84 | 491 | ipv6_chk_prefix(addr6, t->dev)) |
fadf6bf0 TF |
492 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; |
493 | else | |
494 | ok = 0; | |
495 | } | |
ef9a9d11 | 496 | rcu_read_unlock(); |
fadf6bf0 TF |
497 | return ok; |
498 | } | |
499 | ||
1da177e4 LT |
500 | static void ipip6_tunnel_uninit(struct net_device *dev) |
501 | { | |
ca8def14 PE |
502 | struct net *net = dev_net(dev); |
503 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
504 | ||
cd3dbc19 | 505 | if (dev == sitn->fb_tunnel_dev) { |
a9b3cd7f | 506 | RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL); |
1da177e4 | 507 | } else { |
ca8def14 | 508 | ipip6_tunnel_unlink(sitn, netdev_priv(dev)); |
02e10b90 | 509 | ipip6_tunnel_del_prl(netdev_priv(dev), NULL); |
1da177e4 | 510 | } |
3a43be3c | 511 | dev_put(dev); |
1da177e4 LT |
512 | } |
513 | ||
514 | ||
c73cb5a2 | 515 | static int ipip6_err(struct sk_buff *skb, u32 info) |
1da177e4 | 516 | { |
1da177e4 | 517 | |
071f92d0 | 518 | /* All the routers (except for Linux) return only |
1da177e4 LT |
519 | 8 bytes of packet payload. It means, that precise relaying of |
520 | ICMP in the real Internet is absolutely infeasible. | |
521 | */ | |
b71d1d42 | 522 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
88c7664f ACM |
523 | const int type = icmp_hdr(skb)->type; |
524 | const int code = icmp_hdr(skb)->code; | |
1da177e4 | 525 | struct ip_tunnel *t; |
c73cb5a2 | 526 | int err; |
1da177e4 LT |
527 | |
528 | switch (type) { | |
529 | default: | |
530 | case ICMP_PARAMETERPROB: | |
c73cb5a2 | 531 | return 0; |
1da177e4 LT |
532 | |
533 | case ICMP_DEST_UNREACH: | |
534 | switch (code) { | |
535 | case ICMP_SR_FAILED: | |
536 | case ICMP_PORT_UNREACH: | |
537 | /* Impossible event. */ | |
c73cb5a2 | 538 | return 0; |
1da177e4 LT |
539 | default: |
540 | /* All others are translated to HOST_UNREACH. | |
541 | rfc2003 contains "deep thoughts" about NET_UNREACH, | |
542 | I believe they are just ether pollution. --ANK | |
543 | */ | |
544 | break; | |
545 | } | |
546 | break; | |
547 | case ICMP_TIME_EXCEEDED: | |
548 | if (code != ICMP_EXC_TTL) | |
c73cb5a2 | 549 | return 0; |
1da177e4 | 550 | break; |
ec18d9a2 DM |
551 | case ICMP_REDIRECT: |
552 | break; | |
1da177e4 LT |
553 | } |
554 | ||
c73cb5a2 KM |
555 | err = -ENOENT; |
556 | ||
4fddbf5d SH |
557 | t = ipip6_tunnel_lookup(dev_net(skb->dev), |
558 | skb->dev, | |
559 | iph->daddr, | |
560 | iph->saddr); | |
36393395 DM |
561 | if (t == NULL) |
562 | goto out; | |
563 | ||
564 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { | |
565 | ipv4_update_pmtu(skb, dev_net(skb->dev), info, | |
566 | t->dev->ifindex, 0, IPPROTO_IPV6, 0); | |
567 | err = 0; | |
568 | goto out; | |
569 | } | |
ec18d9a2 DM |
570 | if (type == ICMP_REDIRECT) { |
571 | ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0, | |
572 | IPPROTO_IPV6, 0); | |
573 | err = 0; | |
574 | goto out; | |
575 | } | |
36393395 DM |
576 | |
577 | if (t->parms.iph.daddr == 0) | |
1da177e4 | 578 | goto out; |
c73cb5a2 KM |
579 | |
580 | err = 0; | |
1da177e4 LT |
581 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
582 | goto out; | |
583 | ||
bb80087a | 584 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
1da177e4 LT |
585 | t->err_count++; |
586 | else | |
587 | t->err_count = 1; | |
588 | t->err_time = jiffies; | |
589 | out: | |
c73cb5a2 | 590 | return err; |
1da177e4 LT |
591 | } |
592 | ||
1da177e4 LT |
593 | static int ipip6_rcv(struct sk_buff *skb) |
594 | { | |
b71d1d42 | 595 | const struct iphdr *iph; |
1da177e4 | 596 | struct ip_tunnel *tunnel; |
f4e0b4c5 | 597 | int err; |
1da177e4 LT |
598 | |
599 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
600 | goto out; | |
601 | ||
eddc9ec5 | 602 | iph = ip_hdr(skb); |
1da177e4 | 603 | |
4fddbf5d SH |
604 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
605 | iph->saddr, iph->daddr); | |
606 | if (tunnel != NULL) { | |
15fc1f70 ED |
607 | struct pcpu_tstats *tstats; |
608 | ||
1da177e4 | 609 | secpath_reset(skb); |
b0e380b1 | 610 | skb->mac_header = skb->network_header; |
c1d2bbe1 | 611 | skb_reset_network_header(skb); |
8cdfab8a | 612 | IPCB(skb)->flags = 0; |
1da177e4 LT |
613 | skb->protocol = htons(ETH_P_IPV6); |
614 | skb->pkt_type = PACKET_HOST; | |
c7dc89c0 FT |
615 | |
616 | if ((tunnel->dev->priv_flags & IFF_ISATAP) && | |
fadf6bf0 | 617 | !isatap_chksrc(skb, iph, tunnel)) { |
4eecc107 | 618 | tunnel->dev->stats.rx_errors++; |
f4e0b4c5 ND |
619 | goto out; |
620 | } | |
621 | ||
622 | __skb_tunnel_rx(skb, tunnel->dev); | |
623 | ||
624 | err = IP_ECN_decapsulate(iph, skb); | |
625 | if (unlikely(err)) { | |
626 | if (log_ecn_error) | |
627 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
628 | &iph->saddr, iph->tos); | |
629 | if (err > 1) { | |
630 | ++tunnel->dev->stats.rx_frame_errors; | |
631 | ++tunnel->dev->stats.rx_errors; | |
632 | goto out; | |
633 | } | |
c7dc89c0 | 634 | } |
d19d56dd | 635 | |
15fc1f70 ED |
636 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
637 | tstats->rx_packets++; | |
638 | tstats->rx_bytes += skb->len; | |
639 | ||
caf586e5 | 640 | netif_rx(skb); |
8990f468 | 641 | |
1da177e4 LT |
642 | return 0; |
643 | } | |
644 | ||
6dcdd1b3 | 645 | /* no tunnel matched, let upstream know, ipsec may handle it */ |
6dcdd1b3 | 646 | return 1; |
1da177e4 | 647 | out: |
36ca34cc | 648 | kfree_skb(skb); |
1da177e4 LT |
649 | return 0; |
650 | } | |
651 | ||
fa857afc YH |
652 | /* |
653 | * Returns the embedded IPv4 address if the IPv6 address | |
654 | * comes from 6rd / 6to4 (RFC 3056) addr space. | |
655 | */ | |
656 | static inline | |
b71d1d42 | 657 | __be32 try_6rd(const struct in6_addr *v6dst, struct ip_tunnel *tunnel) |
1da177e4 | 658 | { |
e69a4adc | 659 | __be32 dst = 0; |
1da177e4 | 660 | |
fa857afc YH |
661 | #ifdef CONFIG_IPV6_SIT_6RD |
662 | if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix, | |
663 | tunnel->ip6rd.prefixlen)) { | |
3a43be3c | 664 | unsigned int pbw0, pbi0; |
fa857afc YH |
665 | int pbi1; |
666 | u32 d; | |
667 | ||
668 | pbw0 = tunnel->ip6rd.prefixlen >> 5; | |
669 | pbi0 = tunnel->ip6rd.prefixlen & 0x1f; | |
670 | ||
e7db38c3 | 671 | d = (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >> |
fa857afc YH |
672 | tunnel->ip6rd.relay_prefixlen; |
673 | ||
674 | pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen; | |
675 | if (pbi1 > 0) | |
e7db38c3 | 676 | d |= ntohl(v6dst->s6_addr32[pbw0 + 1]) >> |
fa857afc YH |
677 | (32 - pbi1); |
678 | ||
679 | dst = tunnel->ip6rd.relay_prefix | htonl(d); | |
680 | } | |
681 | #else | |
1da177e4 | 682 | if (v6dst->s6_addr16[0] == htons(0x2002)) { |
1ab1457c | 683 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
1da177e4 LT |
684 | memcpy(&dst, &v6dst->s6_addr16[1], 4); |
685 | } | |
fa857afc | 686 | #endif |
1da177e4 LT |
687 | return dst; |
688 | } | |
689 | ||
690 | /* | |
691 | * This function assumes it is being called from dev_queue_xmit() | |
692 | * and that skb is filled properly by that function. | |
693 | */ | |
694 | ||
6fef4c0c SH |
695 | static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, |
696 | struct net_device *dev) | |
1da177e4 | 697 | { |
2941a486 | 698 | struct ip_tunnel *tunnel = netdev_priv(dev); |
b71d1d42 ED |
699 | const struct iphdr *tiph = &tunnel->parms.iph; |
700 | const struct ipv6hdr *iph6 = ipv6_hdr(skb); | |
1da177e4 | 701 | u8 tos = tunnel->parms.iph.tos; |
292f4f3c | 702 | __be16 df = tiph->frag_off; |
1da177e4 | 703 | struct rtable *rt; /* Route to the other host */ |
15fc1f70 | 704 | struct net_device *tdev; /* Device to other host */ |
1da177e4 | 705 | struct iphdr *iph; /* Our new IP header */ |
c2636b4d | 706 | unsigned int max_headroom; /* The extra header space needed */ |
e69a4adc | 707 | __be32 dst = tiph->daddr; |
31e4543d | 708 | struct flowi4 fl4; |
1da177e4 | 709 | int mtu; |
b71d1d42 | 710 | const struct in6_addr *addr6; |
1da177e4 LT |
711 | int addr_type; |
712 | ||
1da177e4 LT |
713 | if (skb->protocol != htons(ETH_P_IPV6)) |
714 | goto tx_error; | |
715 | ||
c2bceb3d LEM |
716 | if (tos == 1) |
717 | tos = ipv6_get_dsfield(iph6); | |
718 | ||
c7dc89c0 FT |
719 | /* ISATAP (RFC4214) - must come before 6to4 */ |
720 | if (dev->priv_flags & IFF_ISATAP) { | |
721 | struct neighbour *neigh = NULL; | |
1e2927b0 | 722 | bool do_tx_error = false; |
c7dc89c0 | 723 | |
adf30907 | 724 | if (skb_dst(skb)) |
1e2927b0 | 725 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
c7dc89c0 FT |
726 | |
727 | if (neigh == NULL) { | |
e87cc472 | 728 | net_dbg_ratelimited("sit: nexthop == NULL\n"); |
c7dc89c0 FT |
729 | goto tx_error; |
730 | } | |
731 | ||
3e866703 | 732 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
c7dc89c0 FT |
733 | addr_type = ipv6_addr_type(addr6); |
734 | ||
735 | if ((addr_type & IPV6_ADDR_UNICAST) && | |
736 | ipv6_addr_is_isatap(addr6)) | |
737 | dst = addr6->s6_addr32[3]; | |
738 | else | |
1e2927b0 DM |
739 | do_tx_error = true; |
740 | ||
741 | neigh_release(neigh); | |
742 | if (do_tx_error) | |
c7dc89c0 FT |
743 | goto tx_error; |
744 | } | |
745 | ||
1da177e4 | 746 | if (!dst) |
fa857afc | 747 | dst = try_6rd(&iph6->daddr, tunnel); |
1da177e4 LT |
748 | |
749 | if (!dst) { | |
750 | struct neighbour *neigh = NULL; | |
1e2927b0 | 751 | bool do_tx_error = false; |
1da177e4 | 752 | |
adf30907 | 753 | if (skb_dst(skb)) |
1e2927b0 | 754 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
1da177e4 LT |
755 | |
756 | if (neigh == NULL) { | |
e87cc472 | 757 | net_dbg_ratelimited("sit: nexthop == NULL\n"); |
1da177e4 LT |
758 | goto tx_error; |
759 | } | |
760 | ||
3e866703 | 761 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
1da177e4 LT |
762 | addr_type = ipv6_addr_type(addr6); |
763 | ||
764 | if (addr_type == IPV6_ADDR_ANY) { | |
0660e03f | 765 | addr6 = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
766 | addr_type = ipv6_addr_type(addr6); |
767 | } | |
768 | ||
1e2927b0 DM |
769 | if ((addr_type & IPV6_ADDR_COMPATv4) != 0) |
770 | dst = addr6->s6_addr32[3]; | |
771 | else | |
772 | do_tx_error = true; | |
1da177e4 | 773 | |
1e2927b0 DM |
774 | neigh_release(neigh); |
775 | if (do_tx_error) | |
776 | goto tx_error; | |
1da177e4 LT |
777 | } |
778 | ||
31e4543d | 779 | rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, |
78fbfd8a DM |
780 | dst, tiph->saddr, |
781 | 0, 0, | |
782 | IPPROTO_IPV6, RT_TOS(tos), | |
783 | tunnel->parms.link); | |
784 | if (IS_ERR(rt)) { | |
785 | dev->stats.tx_carrier_errors++; | |
786 | goto tx_error_icmp; | |
1da177e4 LT |
787 | } |
788 | if (rt->rt_type != RTN_UNICAST) { | |
789 | ip_rt_put(rt); | |
15fc1f70 | 790 | dev->stats.tx_carrier_errors++; |
1da177e4 LT |
791 | goto tx_error_icmp; |
792 | } | |
d8d1f30b | 793 | tdev = rt->dst.dev; |
1da177e4 LT |
794 | |
795 | if (tdev == dev) { | |
796 | ip_rt_put(rt); | |
15fc1f70 | 797 | dev->stats.collisions++; |
1da177e4 LT |
798 | goto tx_error; |
799 | } | |
800 | ||
292f4f3c | 801 | if (df) { |
d8d1f30b | 802 | mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr); |
1da177e4 | 803 | |
292f4f3c | 804 | if (mtu < 68) { |
15fc1f70 | 805 | dev->stats.collisions++; |
292f4f3c HX |
806 | ip_rt_put(rt); |
807 | goto tx_error; | |
808 | } | |
1da177e4 | 809 | |
292f4f3c HX |
810 | if (mtu < IPV6_MIN_MTU) { |
811 | mtu = IPV6_MIN_MTU; | |
812 | df = 0; | |
813 | } | |
814 | ||
815 | if (tunnel->parms.iph.daddr && skb_dst(skb)) | |
6700c270 | 816 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
292f4f3c HX |
817 | |
818 | if (skb->len > mtu) { | |
3ffe533c | 819 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
292f4f3c HX |
820 | ip_rt_put(rt); |
821 | goto tx_error; | |
822 | } | |
1da177e4 LT |
823 | } |
824 | ||
825 | if (tunnel->err_count > 0) { | |
bb80087a WY |
826 | if (time_before(jiffies, |
827 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { | |
1da177e4 LT |
828 | tunnel->err_count--; |
829 | dst_link_failure(skb); | |
830 | } else | |
831 | tunnel->err_count = 0; | |
832 | } | |
833 | ||
834 | /* | |
835 | * Okay, now see if we can stuff it in the buffer as-is. | |
836 | */ | |
837 | max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); | |
838 | ||
cfbba49d PM |
839 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
840 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { | |
1da177e4 LT |
841 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
842 | if (!new_skb) { | |
843 | ip_rt_put(rt); | |
15fc1f70 | 844 | dev->stats.tx_dropped++; |
1da177e4 | 845 | dev_kfree_skb(skb); |
6ed10654 | 846 | return NETDEV_TX_OK; |
1da177e4 LT |
847 | } |
848 | if (skb->sk) | |
849 | skb_set_owner_w(new_skb, skb->sk); | |
850 | dev_kfree_skb(skb); | |
851 | skb = new_skb; | |
0660e03f | 852 | iph6 = ipv6_hdr(skb); |
1da177e4 LT |
853 | } |
854 | ||
b0e380b1 | 855 | skb->transport_header = skb->network_header; |
e2d1bca7 ACM |
856 | skb_push(skb, sizeof(struct iphdr)); |
857 | skb_reset_network_header(skb); | |
1da177e4 | 858 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
8cdfab8a | 859 | IPCB(skb)->flags = 0; |
adf30907 | 860 | skb_dst_drop(skb); |
d8d1f30b | 861 | skb_dst_set(skb, &rt->dst); |
1da177e4 LT |
862 | |
863 | /* | |
864 | * Push down and install the IPIP header. | |
865 | */ | |
866 | ||
eddc9ec5 | 867 | iph = ip_hdr(skb); |
1da177e4 LT |
868 | iph->version = 4; |
869 | iph->ihl = sizeof(struct iphdr)>>2; | |
292f4f3c | 870 | iph->frag_off = df; |
1da177e4 LT |
871 | iph->protocol = IPPROTO_IPV6; |
872 | iph->tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); | |
301102cc DM |
873 | iph->daddr = fl4.daddr; |
874 | iph->saddr = fl4.saddr; | |
1da177e4 LT |
875 | |
876 | if ((iph->ttl = tiph->ttl) == 0) | |
877 | iph->ttl = iph6->hop_limit; | |
878 | ||
aa0010f8 | 879 | iptunnel_xmit(skb, dev); |
6ed10654 | 880 | return NETDEV_TX_OK; |
1da177e4 LT |
881 | |
882 | tx_error_icmp: | |
883 | dst_link_failure(skb); | |
884 | tx_error: | |
15fc1f70 | 885 | dev->stats.tx_errors++; |
1da177e4 | 886 | dev_kfree_skb(skb); |
6ed10654 | 887 | return NETDEV_TX_OK; |
1da177e4 LT |
888 | } |
889 | ||
8a4a50f9 MS |
890 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
891 | { | |
892 | struct net_device *tdev = NULL; | |
893 | struct ip_tunnel *tunnel; | |
b71d1d42 | 894 | const struct iphdr *iph; |
31e4543d | 895 | struct flowi4 fl4; |
8a4a50f9 MS |
896 | |
897 | tunnel = netdev_priv(dev); | |
898 | iph = &tunnel->parms.iph; | |
899 | ||
900 | if (iph->daddr) { | |
31e4543d | 901 | struct rtable *rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, |
78fbfd8a DM |
902 | iph->daddr, iph->saddr, |
903 | 0, 0, | |
904 | IPPROTO_IPV6, | |
905 | RT_TOS(iph->tos), | |
906 | tunnel->parms.link); | |
b23dd4fe DM |
907 | |
908 | if (!IS_ERR(rt)) { | |
d8d1f30b | 909 | tdev = rt->dst.dev; |
8a4a50f9 MS |
910 | ip_rt_put(rt); |
911 | } | |
912 | dev->flags |= IFF_POINTOPOINT; | |
913 | } | |
914 | ||
915 | if (!tdev && tunnel->parms.link) | |
907a08c4 | 916 | tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link); |
8a4a50f9 MS |
917 | |
918 | if (tdev) { | |
919 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); | |
920 | dev->mtu = tdev->mtu - sizeof(struct iphdr); | |
921 | if (dev->mtu < IPV6_MIN_MTU) | |
922 | dev->mtu = IPV6_MIN_MTU; | |
923 | } | |
924 | dev->iflink = tunnel->parms.link; | |
925 | } | |
926 | ||
f3723416 ND |
927 | static void ipip6_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p) |
928 | { | |
929 | struct net *net = dev_net(t->dev); | |
930 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
931 | ||
932 | ipip6_tunnel_unlink(sitn, t); | |
933 | synchronize_net(); | |
934 | t->parms.iph.saddr = p->iph.saddr; | |
935 | t->parms.iph.daddr = p->iph.daddr; | |
936 | memcpy(t->dev->dev_addr, &p->iph.saddr, 4); | |
937 | memcpy(t->dev->broadcast, &p->iph.daddr, 4); | |
938 | ipip6_tunnel_link(sitn, t); | |
939 | t->parms.iph.ttl = p->iph.ttl; | |
940 | t->parms.iph.tos = p->iph.tos; | |
941 | if (t->parms.link != p->link) { | |
942 | t->parms.link = p->link; | |
943 | ipip6_tunnel_bind_dev(t->dev); | |
944 | } | |
945 | netdev_state_change(t->dev); | |
946 | } | |
947 | ||
e2f1f072 ND |
948 | #ifdef CONFIG_IPV6_SIT_6RD |
949 | static int ipip6_tunnel_update_6rd(struct ip_tunnel *t, | |
950 | struct ip_tunnel_6rd *ip6rd) | |
951 | { | |
952 | struct in6_addr prefix; | |
953 | __be32 relay_prefix; | |
954 | ||
955 | if (ip6rd->relay_prefixlen > 32 || | |
956 | ip6rd->prefixlen + (32 - ip6rd->relay_prefixlen) > 64) | |
957 | return -EINVAL; | |
958 | ||
959 | ipv6_addr_prefix(&prefix, &ip6rd->prefix, ip6rd->prefixlen); | |
960 | if (!ipv6_addr_equal(&prefix, &ip6rd->prefix)) | |
961 | return -EINVAL; | |
962 | if (ip6rd->relay_prefixlen) | |
963 | relay_prefix = ip6rd->relay_prefix & | |
964 | htonl(0xffffffffUL << | |
965 | (32 - ip6rd->relay_prefixlen)); | |
966 | else | |
967 | relay_prefix = 0; | |
968 | if (relay_prefix != ip6rd->relay_prefix) | |
969 | return -EINVAL; | |
970 | ||
971 | t->ip6rd.prefix = prefix; | |
972 | t->ip6rd.relay_prefix = relay_prefix; | |
973 | t->ip6rd.prefixlen = ip6rd->prefixlen; | |
974 | t->ip6rd.relay_prefixlen = ip6rd->relay_prefixlen; | |
975 | netdev_state_change(t->dev); | |
976 | return 0; | |
977 | } | |
978 | #endif | |
979 | ||
1da177e4 LT |
980 | static int |
981 | ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) | |
982 | { | |
983 | int err = 0; | |
984 | struct ip_tunnel_parm p; | |
fadf6bf0 | 985 | struct ip_tunnel_prl prl; |
1da177e4 | 986 | struct ip_tunnel *t; |
ca8def14 PE |
987 | struct net *net = dev_net(dev); |
988 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
fa857afc YH |
989 | #ifdef CONFIG_IPV6_SIT_6RD |
990 | struct ip_tunnel_6rd ip6rd; | |
991 | #endif | |
1da177e4 LT |
992 | |
993 | switch (cmd) { | |
994 | case SIOCGETTUNNEL: | |
fa857afc YH |
995 | #ifdef CONFIG_IPV6_SIT_6RD |
996 | case SIOCGET6RD: | |
997 | #endif | |
1da177e4 | 998 | t = NULL; |
cd3dbc19 | 999 | if (dev == sitn->fb_tunnel_dev) { |
1da177e4 LT |
1000 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
1001 | err = -EFAULT; | |
1002 | break; | |
1003 | } | |
ca8def14 | 1004 | t = ipip6_tunnel_locate(net, &p, 0); |
1da177e4 LT |
1005 | } |
1006 | if (t == NULL) | |
2941a486 | 1007 | t = netdev_priv(dev); |
fa857afc YH |
1008 | |
1009 | err = -EFAULT; | |
1010 | if (cmd == SIOCGETTUNNEL) { | |
1011 | memcpy(&p, &t->parms, sizeof(p)); | |
1012 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, | |
1013 | sizeof(p))) | |
1014 | goto done; | |
1015 | #ifdef CONFIG_IPV6_SIT_6RD | |
1016 | } else { | |
4e3fd7a0 | 1017 | ip6rd.prefix = t->ip6rd.prefix; |
fa857afc YH |
1018 | ip6rd.relay_prefix = t->ip6rd.relay_prefix; |
1019 | ip6rd.prefixlen = t->ip6rd.prefixlen; | |
1020 | ip6rd.relay_prefixlen = t->ip6rd.relay_prefixlen; | |
1021 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, | |
1022 | sizeof(ip6rd))) | |
1023 | goto done; | |
1024 | #endif | |
1025 | } | |
1026 | err = 0; | |
1da177e4 LT |
1027 | break; |
1028 | ||
1029 | case SIOCADDTUNNEL: | |
1030 | case SIOCCHGTUNNEL: | |
1031 | err = -EPERM; | |
af31f412 | 1032 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1033 | goto done; |
1034 | ||
1035 | err = -EFAULT; | |
1036 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1037 | goto done; | |
1038 | ||
1039 | err = -EINVAL; | |
1040 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPV6 || | |
1041 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) | |
1042 | goto done; | |
1043 | if (p.iph.ttl) | |
1044 | p.iph.frag_off |= htons(IP_DF); | |
1045 | ||
ca8def14 | 1046 | t = ipip6_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
1da177e4 | 1047 | |
cd3dbc19 | 1048 | if (dev != sitn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
1da177e4 LT |
1049 | if (t != NULL) { |
1050 | if (t->dev != dev) { | |
1051 | err = -EEXIST; | |
1052 | break; | |
1053 | } | |
1054 | } else { | |
1055 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || | |
1056 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { | |
1057 | err = -EINVAL; | |
1058 | break; | |
1059 | } | |
2941a486 | 1060 | t = netdev_priv(dev); |
1da177e4 | 1061 | } |
f9cd5a55 | 1062 | |
f3723416 | 1063 | ipip6_tunnel_update(t, &p); |
1da177e4 LT |
1064 | } |
1065 | ||
1066 | if (t) { | |
1067 | err = 0; | |
1da177e4 LT |
1068 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
1069 | err = -EFAULT; | |
1070 | } else | |
1071 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); | |
1072 | break; | |
1073 | ||
1074 | case SIOCDELTUNNEL: | |
1075 | err = -EPERM; | |
af31f412 | 1076 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1077 | goto done; |
1078 | ||
cd3dbc19 | 1079 | if (dev == sitn->fb_tunnel_dev) { |
1da177e4 LT |
1080 | err = -EFAULT; |
1081 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1082 | goto done; | |
1083 | err = -ENOENT; | |
ca8def14 | 1084 | if ((t = ipip6_tunnel_locate(net, &p, 0)) == NULL) |
1da177e4 LT |
1085 | goto done; |
1086 | err = -EPERM; | |
cd3dbc19 | 1087 | if (t == netdev_priv(sitn->fb_tunnel_dev)) |
1da177e4 LT |
1088 | goto done; |
1089 | dev = t->dev; | |
1090 | } | |
22f8cde5 SH |
1091 | unregister_netdevice(dev); |
1092 | err = 0; | |
1da177e4 LT |
1093 | break; |
1094 | ||
300aaeea | 1095 | case SIOCGETPRL: |
2b4743bd YH |
1096 | err = -EINVAL; |
1097 | if (dev == sitn->fb_tunnel_dev) | |
1098 | goto done; | |
1099 | err = -ENOENT; | |
1100 | if (!(t = netdev_priv(dev))) | |
1101 | goto done; | |
1102 | err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data); | |
1103 | break; | |
1104 | ||
fadf6bf0 TF |
1105 | case SIOCADDPRL: |
1106 | case SIOCDELPRL: | |
1107 | case SIOCCHGPRL: | |
1108 | err = -EPERM; | |
af31f412 | 1109 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
fadf6bf0 TF |
1110 | goto done; |
1111 | err = -EINVAL; | |
cd3dbc19 | 1112 | if (dev == sitn->fb_tunnel_dev) |
fadf6bf0 TF |
1113 | goto done; |
1114 | err = -EFAULT; | |
1115 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) | |
1116 | goto done; | |
1117 | err = -ENOENT; | |
1118 | if (!(t = netdev_priv(dev))) | |
1119 | goto done; | |
1120 | ||
300aaeea | 1121 | switch (cmd) { |
300aaeea | 1122 | case SIOCDELPRL: |
fadf6bf0 | 1123 | err = ipip6_tunnel_del_prl(t, &prl); |
300aaeea YH |
1124 | break; |
1125 | case SIOCADDPRL: | |
1126 | case SIOCCHGPRL: | |
fadf6bf0 | 1127 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); |
300aaeea YH |
1128 | break; |
1129 | } | |
2b4743bd | 1130 | netdev_state_change(dev); |
fadf6bf0 TF |
1131 | break; |
1132 | ||
fa857afc YH |
1133 | #ifdef CONFIG_IPV6_SIT_6RD |
1134 | case SIOCADD6RD: | |
1135 | case SIOCCHG6RD: | |
1136 | case SIOCDEL6RD: | |
1137 | err = -EPERM; | |
af31f412 | 1138 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
fa857afc YH |
1139 | goto done; |
1140 | ||
1141 | err = -EFAULT; | |
1142 | if (copy_from_user(&ip6rd, ifr->ifr_ifru.ifru_data, | |
1143 | sizeof(ip6rd))) | |
1144 | goto done; | |
1145 | ||
1146 | t = netdev_priv(dev); | |
1147 | ||
1148 | if (cmd != SIOCDEL6RD) { | |
e2f1f072 ND |
1149 | err = ipip6_tunnel_update_6rd(t, &ip6rd); |
1150 | if (err < 0) | |
fa857afc | 1151 | goto done; |
fa857afc | 1152 | } else |
e0c93948 | 1153 | ipip6_tunnel_clone_6rd(dev, sitn); |
fa857afc YH |
1154 | |
1155 | err = 0; | |
1156 | break; | |
1157 | #endif | |
1158 | ||
1da177e4 LT |
1159 | default: |
1160 | err = -EINVAL; | |
1161 | } | |
1162 | ||
1163 | done: | |
1164 | return err; | |
1165 | } | |
1166 | ||
1da177e4 LT |
1167 | static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) |
1168 | { | |
1169 | if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - sizeof(struct iphdr)) | |
1170 | return -EINVAL; | |
1171 | dev->mtu = new_mtu; | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1326c3d5 SH |
1175 | static const struct net_device_ops ipip6_netdev_ops = { |
1176 | .ndo_uninit = ipip6_tunnel_uninit, | |
1177 | .ndo_start_xmit = ipip6_tunnel_xmit, | |
1178 | .ndo_do_ioctl = ipip6_tunnel_ioctl, | |
1179 | .ndo_change_mtu = ipip6_tunnel_change_mtu, | |
87b6d218 | 1180 | .ndo_get_stats64= ipip6_get_stats64, |
1326c3d5 SH |
1181 | }; |
1182 | ||
15fc1f70 ED |
1183 | static void ipip6_dev_free(struct net_device *dev) |
1184 | { | |
1185 | free_percpu(dev->tstats); | |
1186 | free_netdev(dev); | |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | static void ipip6_tunnel_setup(struct net_device *dev) |
1190 | { | |
1326c3d5 | 1191 | dev->netdev_ops = &ipip6_netdev_ops; |
15fc1f70 | 1192 | dev->destructor = ipip6_dev_free; |
1da177e4 LT |
1193 | |
1194 | dev->type = ARPHRD_SIT; | |
1195 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); | |
46f25dff | 1196 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
1da177e4 | 1197 | dev->flags = IFF_NOARP; |
f2ba025b | 1198 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 LT |
1199 | dev->iflink = 0; |
1200 | dev->addr_len = 4; | |
7a97146c | 1201 | dev->features |= NETIF_F_NETNS_LOCAL; |
8df40d10 | 1202 | dev->features |= NETIF_F_LLTX; |
1da177e4 LT |
1203 | } |
1204 | ||
15fc1f70 | 1205 | static int ipip6_tunnel_init(struct net_device *dev) |
1da177e4 | 1206 | { |
1326c3d5 | 1207 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4 LT |
1208 | |
1209 | tunnel->dev = dev; | |
1da177e4 LT |
1210 | |
1211 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); | |
1212 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); | |
1213 | ||
8a4a50f9 | 1214 | ipip6_tunnel_bind_dev(dev); |
15fc1f70 ED |
1215 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1216 | if (!dev->tstats) | |
1217 | return -ENOMEM; | |
1218 | ||
1219 | return 0; | |
1da177e4 LT |
1220 | } |
1221 | ||
dd4080ee | 1222 | static int __net_init ipip6_fb_tunnel_init(struct net_device *dev) |
1da177e4 | 1223 | { |
2941a486 | 1224 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4 | 1225 | struct iphdr *iph = &tunnel->parms.iph; |
29182176 PE |
1226 | struct net *net = dev_net(dev); |
1227 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
1da177e4 LT |
1228 | |
1229 | tunnel->dev = dev; | |
1230 | strcpy(tunnel->parms.name, dev->name); | |
1231 | ||
1232 | iph->version = 4; | |
1233 | iph->protocol = IPPROTO_IPV6; | |
1234 | iph->ihl = 5; | |
1235 | iph->ttl = 64; | |
1236 | ||
dd4080ee ED |
1237 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
1238 | if (!dev->tstats) | |
1239 | return -ENOMEM; | |
1da177e4 | 1240 | dev_hold(dev); |
cf778b00 | 1241 | rcu_assign_pointer(sitn->tunnels_wc[0], tunnel); |
dd4080ee | 1242 | return 0; |
1da177e4 LT |
1243 | } |
1244 | ||
f3723416 ND |
1245 | static void ipip6_netlink_parms(struct nlattr *data[], |
1246 | struct ip_tunnel_parm *parms) | |
1247 | { | |
1248 | memset(parms, 0, sizeof(*parms)); | |
1249 | ||
1250 | parms->iph.version = 4; | |
1251 | parms->iph.protocol = IPPROTO_IPV6; | |
1252 | parms->iph.ihl = 5; | |
1253 | parms->iph.ttl = 64; | |
1254 | ||
1255 | if (!data) | |
1256 | return; | |
1257 | ||
1258 | if (data[IFLA_IPTUN_LINK]) | |
1259 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); | |
1260 | ||
1261 | if (data[IFLA_IPTUN_LOCAL]) | |
d440b720 | 1262 | parms->iph.saddr = nla_get_be32(data[IFLA_IPTUN_LOCAL]); |
f3723416 ND |
1263 | |
1264 | if (data[IFLA_IPTUN_REMOTE]) | |
d440b720 | 1265 | parms->iph.daddr = nla_get_be32(data[IFLA_IPTUN_REMOTE]); |
f3723416 ND |
1266 | |
1267 | if (data[IFLA_IPTUN_TTL]) { | |
1268 | parms->iph.ttl = nla_get_u8(data[IFLA_IPTUN_TTL]); | |
1269 | if (parms->iph.ttl) | |
1270 | parms->iph.frag_off = htons(IP_DF); | |
1271 | } | |
1272 | ||
1273 | if (data[IFLA_IPTUN_TOS]) | |
1274 | parms->iph.tos = nla_get_u8(data[IFLA_IPTUN_TOS]); | |
1275 | ||
1276 | if (!data[IFLA_IPTUN_PMTUDISC] || nla_get_u8(data[IFLA_IPTUN_PMTUDISC])) | |
1277 | parms->iph.frag_off = htons(IP_DF); | |
1278 | ||
1279 | if (data[IFLA_IPTUN_FLAGS]) | |
d440b720 | 1280 | parms->i_flags = nla_get_be16(data[IFLA_IPTUN_FLAGS]); |
f3723416 ND |
1281 | } |
1282 | ||
e2f1f072 ND |
1283 | #ifdef CONFIG_IPV6_SIT_6RD |
1284 | /* This function returns true when 6RD attributes are present in the nl msg */ | |
1285 | static bool ipip6_netlink_6rd_parms(struct nlattr *data[], | |
1286 | struct ip_tunnel_6rd *ip6rd) | |
1287 | { | |
1288 | bool ret = false; | |
1289 | memset(ip6rd, 0, sizeof(*ip6rd)); | |
1290 | ||
1291 | if (!data) | |
1292 | return ret; | |
1293 | ||
1294 | if (data[IFLA_IPTUN_6RD_PREFIX]) { | |
1295 | ret = true; | |
1296 | nla_memcpy(&ip6rd->prefix, data[IFLA_IPTUN_6RD_PREFIX], | |
1297 | sizeof(struct in6_addr)); | |
1298 | } | |
1299 | ||
1300 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIX]) { | |
1301 | ret = true; | |
1302 | ip6rd->relay_prefix = | |
1303 | nla_get_be32(data[IFLA_IPTUN_6RD_RELAY_PREFIX]); | |
1304 | } | |
1305 | ||
1306 | if (data[IFLA_IPTUN_6RD_PREFIXLEN]) { | |
1307 | ret = true; | |
1308 | ip6rd->prefixlen = nla_get_u16(data[IFLA_IPTUN_6RD_PREFIXLEN]); | |
1309 | } | |
1310 | ||
1311 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) { | |
1312 | ret = true; | |
1313 | ip6rd->relay_prefixlen = | |
1314 | nla_get_u16(data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]); | |
1315 | } | |
1316 | ||
1317 | return ret; | |
1318 | } | |
1319 | #endif | |
1320 | ||
f3723416 ND |
1321 | static int ipip6_newlink(struct net *src_net, struct net_device *dev, |
1322 | struct nlattr *tb[], struct nlattr *data[]) | |
1323 | { | |
1324 | struct net *net = dev_net(dev); | |
1325 | struct ip_tunnel *nt; | |
e2f1f072 ND |
1326 | #ifdef CONFIG_IPV6_SIT_6RD |
1327 | struct ip_tunnel_6rd ip6rd; | |
1328 | #endif | |
1329 | int err; | |
f3723416 ND |
1330 | |
1331 | nt = netdev_priv(dev); | |
1332 | ipip6_netlink_parms(data, &nt->parms); | |
1333 | ||
1334 | if (ipip6_tunnel_locate(net, &nt->parms, 0)) | |
1335 | return -EEXIST; | |
1336 | ||
e2f1f072 ND |
1337 | err = ipip6_tunnel_create(dev); |
1338 | if (err < 0) | |
1339 | return err; | |
1340 | ||
1341 | #ifdef CONFIG_IPV6_SIT_6RD | |
1342 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) | |
1343 | err = ipip6_tunnel_update_6rd(nt, &ip6rd); | |
1344 | #endif | |
1345 | ||
1346 | return err; | |
f3723416 ND |
1347 | } |
1348 | ||
1349 | static int ipip6_changelink(struct net_device *dev, struct nlattr *tb[], | |
1350 | struct nlattr *data[]) | |
1351 | { | |
1352 | struct ip_tunnel *t; | |
1353 | struct ip_tunnel_parm p; | |
1354 | struct net *net = dev_net(dev); | |
1355 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
e2f1f072 ND |
1356 | #ifdef CONFIG_IPV6_SIT_6RD |
1357 | struct ip_tunnel_6rd ip6rd; | |
1358 | #endif | |
f3723416 ND |
1359 | |
1360 | if (dev == sitn->fb_tunnel_dev) | |
1361 | return -EINVAL; | |
1362 | ||
1363 | ipip6_netlink_parms(data, &p); | |
1364 | ||
1365 | if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) || | |
1366 | (!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr)) | |
1367 | return -EINVAL; | |
1368 | ||
1369 | t = ipip6_tunnel_locate(net, &p, 0); | |
1370 | ||
1371 | if (t) { | |
1372 | if (t->dev != dev) | |
1373 | return -EEXIST; | |
1374 | } else | |
1375 | t = netdev_priv(dev); | |
1376 | ||
1377 | ipip6_tunnel_update(t, &p); | |
e2f1f072 ND |
1378 | |
1379 | #ifdef CONFIG_IPV6_SIT_6RD | |
1380 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) | |
1381 | return ipip6_tunnel_update_6rd(t, &ip6rd); | |
1382 | #endif | |
1383 | ||
f3723416 ND |
1384 | return 0; |
1385 | } | |
1386 | ||
e4c94a9c | 1387 | static size_t ipip6_get_size(const struct net_device *dev) |
ba3e3f50 ND |
1388 | { |
1389 | return | |
1390 | /* IFLA_IPTUN_LINK */ | |
1391 | nla_total_size(4) + | |
1392 | /* IFLA_IPTUN_LOCAL */ | |
1393 | nla_total_size(4) + | |
1394 | /* IFLA_IPTUN_REMOTE */ | |
1395 | nla_total_size(4) + | |
1396 | /* IFLA_IPTUN_TTL */ | |
1397 | nla_total_size(1) + | |
1398 | /* IFLA_IPTUN_TOS */ | |
1399 | nla_total_size(1) + | |
a12c9a85 ND |
1400 | /* IFLA_IPTUN_PMTUDISC */ |
1401 | nla_total_size(1) + | |
1402 | /* IFLA_IPTUN_FLAGS */ | |
1403 | nla_total_size(2) + | |
e2f1f072 ND |
1404 | #ifdef CONFIG_IPV6_SIT_6RD |
1405 | /* IFLA_IPTUN_6RD_PREFIX */ | |
1406 | nla_total_size(sizeof(struct in6_addr)) + | |
1407 | /* IFLA_IPTUN_6RD_RELAY_PREFIX */ | |
1408 | nla_total_size(4) + | |
1409 | /* IFLA_IPTUN_6RD_PREFIXLEN */ | |
1410 | nla_total_size(2) + | |
1411 | /* IFLA_IPTUN_6RD_RELAY_PREFIXLEN */ | |
1412 | nla_total_size(2) + | |
1413 | #endif | |
ba3e3f50 ND |
1414 | 0; |
1415 | } | |
1416 | ||
e4c94a9c | 1417 | static int ipip6_fill_info(struct sk_buff *skb, const struct net_device *dev) |
ba3e3f50 ND |
1418 | { |
1419 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
1420 | struct ip_tunnel_parm *parm = &tunnel->parms; | |
1421 | ||
1422 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || | |
1423 | nla_put_be32(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) || | |
1424 | nla_put_be32(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) || | |
1425 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) || | |
a12c9a85 ND |
1426 | nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) || |
1427 | nla_put_u8(skb, IFLA_IPTUN_PMTUDISC, | |
1428 | !!(parm->iph.frag_off & htons(IP_DF))) || | |
d440b720 | 1429 | nla_put_be16(skb, IFLA_IPTUN_FLAGS, parm->i_flags)) |
ba3e3f50 | 1430 | goto nla_put_failure; |
e2f1f072 ND |
1431 | |
1432 | #ifdef CONFIG_IPV6_SIT_6RD | |
1433 | if (nla_put(skb, IFLA_IPTUN_6RD_PREFIX, sizeof(struct in6_addr), | |
1434 | &tunnel->ip6rd.prefix) || | |
1435 | nla_put_be32(skb, IFLA_IPTUN_6RD_RELAY_PREFIX, | |
1436 | tunnel->ip6rd.relay_prefix) || | |
1437 | nla_put_u16(skb, IFLA_IPTUN_6RD_PREFIXLEN, | |
1438 | tunnel->ip6rd.prefixlen) || | |
1439 | nla_put_u16(skb, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, | |
1440 | tunnel->ip6rd.relay_prefixlen)) | |
1441 | goto nla_put_failure; | |
1442 | #endif | |
1443 | ||
ba3e3f50 ND |
1444 | return 0; |
1445 | ||
1446 | nla_put_failure: | |
1447 | return -EMSGSIZE; | |
1448 | } | |
1449 | ||
f3723416 ND |
1450 | static const struct nla_policy ipip6_policy[IFLA_IPTUN_MAX + 1] = { |
1451 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, | |
1452 | [IFLA_IPTUN_LOCAL] = { .type = NLA_U32 }, | |
1453 | [IFLA_IPTUN_REMOTE] = { .type = NLA_U32 }, | |
1454 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, | |
1455 | [IFLA_IPTUN_TOS] = { .type = NLA_U8 }, | |
1456 | [IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 }, | |
1457 | [IFLA_IPTUN_FLAGS] = { .type = NLA_U16 }, | |
e2f1f072 ND |
1458 | #ifdef CONFIG_IPV6_SIT_6RD |
1459 | [IFLA_IPTUN_6RD_PREFIX] = { .len = sizeof(struct in6_addr) }, | |
1460 | [IFLA_IPTUN_6RD_RELAY_PREFIX] = { .type = NLA_U32 }, | |
1461 | [IFLA_IPTUN_6RD_PREFIXLEN] = { .type = NLA_U16 }, | |
1462 | [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 }, | |
1463 | #endif | |
f3723416 ND |
1464 | }; |
1465 | ||
ba3e3f50 ND |
1466 | static struct rtnl_link_ops sit_link_ops __read_mostly = { |
1467 | .kind = "sit", | |
1468 | .maxtype = IFLA_IPTUN_MAX, | |
f3723416 | 1469 | .policy = ipip6_policy, |
ba3e3f50 | 1470 | .priv_size = sizeof(struct ip_tunnel), |
f3723416 ND |
1471 | .setup = ipip6_tunnel_setup, |
1472 | .newlink = ipip6_newlink, | |
1473 | .changelink = ipip6_changelink, | |
e4c94a9c ND |
1474 | .get_size = ipip6_get_size, |
1475 | .fill_info = ipip6_fill_info, | |
ba3e3f50 ND |
1476 | }; |
1477 | ||
6dcd814b | 1478 | static struct xfrm_tunnel sit_handler __read_mostly = { |
1da177e4 LT |
1479 | .handler = ipip6_rcv, |
1480 | .err_handler = ipip6_err, | |
c73cb5a2 | 1481 | .priority = 1, |
1da177e4 LT |
1482 | }; |
1483 | ||
2c8c1e72 | 1484 | static void __net_exit sit_destroy_tunnels(struct sit_net *sitn, struct list_head *head) |
db44575f AK |
1485 | { |
1486 | int prio; | |
1487 | ||
1488 | for (prio = 1; prio < 4; prio++) { | |
1489 | int h; | |
1490 | for (h = 0; h < HASH_SIZE; h++) { | |
753ea8e9 | 1491 | struct ip_tunnel *t; |
62808f91 | 1492 | |
753ea8e9 | 1493 | t = rtnl_dereference(sitn->tunnels[prio][h]); |
62808f91 ED |
1494 | while (t != NULL) { |
1495 | unregister_netdevice_queue(t->dev, head); | |
753ea8e9 | 1496 | t = rtnl_dereference(t->next); |
62808f91 | 1497 | } |
db44575f AK |
1498 | } |
1499 | } | |
1500 | } | |
1501 | ||
2c8c1e72 | 1502 | static int __net_init sit_init_net(struct net *net) |
8190d900 | 1503 | { |
67101172 | 1504 | struct sit_net *sitn = net_generic(net, sit_net_id); |
72b36015 | 1505 | struct ip_tunnel *t; |
8190d900 | 1506 | int err; |
8190d900 | 1507 | |
29182176 PE |
1508 | sitn->tunnels[0] = sitn->tunnels_wc; |
1509 | sitn->tunnels[1] = sitn->tunnels_l; | |
1510 | sitn->tunnels[2] = sitn->tunnels_r; | |
1511 | sitn->tunnels[3] = sitn->tunnels_r_l; | |
1512 | ||
cd3dbc19 PE |
1513 | sitn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
1514 | ipip6_tunnel_setup); | |
1515 | if (!sitn->fb_tunnel_dev) { | |
1516 | err = -ENOMEM; | |
1517 | goto err_alloc_dev; | |
1518 | } | |
be77e593 | 1519 | dev_net_set(sitn->fb_tunnel_dev, net); |
cd3dbc19 | 1520 | |
dd4080ee ED |
1521 | err = ipip6_fb_tunnel_init(sitn->fb_tunnel_dev); |
1522 | if (err) | |
1523 | goto err_dev_free; | |
1524 | ||
e0c93948 | 1525 | ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn); |
cd3dbc19 PE |
1526 | |
1527 | if ((err = register_netdev(sitn->fb_tunnel_dev))) | |
1528 | goto err_reg_dev; | |
1529 | ||
72b36015 TF |
1530 | t = netdev_priv(sitn->fb_tunnel_dev); |
1531 | ||
1532 | strcpy(t->parms.name, sitn->fb_tunnel_dev->name); | |
8190d900 PE |
1533 | return 0; |
1534 | ||
cd3dbc19 | 1535 | err_reg_dev: |
1326c3d5 | 1536 | dev_put(sitn->fb_tunnel_dev); |
dd4080ee ED |
1537 | err_dev_free: |
1538 | ipip6_dev_free(sitn->fb_tunnel_dev); | |
cd3dbc19 | 1539 | err_alloc_dev: |
8190d900 PE |
1540 | return err; |
1541 | } | |
1542 | ||
2c8c1e72 | 1543 | static void __net_exit sit_exit_net(struct net *net) |
8190d900 | 1544 | { |
67101172 | 1545 | struct sit_net *sitn = net_generic(net, sit_net_id); |
62808f91 | 1546 | LIST_HEAD(list); |
8190d900 | 1547 | |
cd3dbc19 | 1548 | rtnl_lock(); |
62808f91 ED |
1549 | sit_destroy_tunnels(sitn, &list); |
1550 | unregister_netdevice_queue(sitn->fb_tunnel_dev, &list); | |
1551 | unregister_netdevice_many(&list); | |
cd3dbc19 | 1552 | rtnl_unlock(); |
8190d900 PE |
1553 | } |
1554 | ||
1555 | static struct pernet_operations sit_net_ops = { | |
1556 | .init = sit_init_net, | |
1557 | .exit = sit_exit_net, | |
67101172 EB |
1558 | .id = &sit_net_id, |
1559 | .size = sizeof(struct sit_net), | |
8190d900 PE |
1560 | }; |
1561 | ||
89c89458 | 1562 | static void __exit sit_cleanup(void) |
1da177e4 | 1563 | { |
ba3e3f50 | 1564 | rtnl_link_unregister(&sit_link_ops); |
c73cb5a2 | 1565 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
db44575f | 1566 | |
67101172 | 1567 | unregister_pernet_device(&sit_net_ops); |
ef9a9d11 | 1568 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1da177e4 LT |
1569 | } |
1570 | ||
89c89458 | 1571 | static int __init sit_init(void) |
1da177e4 LT |
1572 | { |
1573 | int err; | |
1574 | ||
f3213831 | 1575 | pr_info("IPv6 over IPv4 tunneling driver\n"); |
1da177e4 | 1576 | |
67101172 | 1577 | err = register_pernet_device(&sit_net_ops); |
8190d900 | 1578 | if (err < 0) |
d5aa407f AD |
1579 | return err; |
1580 | err = xfrm4_tunnel_register(&sit_handler, AF_INET6); | |
1581 | if (err < 0) { | |
f3213831 | 1582 | pr_info("%s: can't add protocol\n", __func__); |
ba3e3f50 | 1583 | goto xfrm_tunnel_failed; |
d5aa407f | 1584 | } |
ba3e3f50 ND |
1585 | err = rtnl_link_register(&sit_link_ops); |
1586 | if (err < 0) | |
1587 | goto rtnl_link_failed; | |
1588 | ||
1589 | out: | |
1da177e4 | 1590 | return err; |
ba3e3f50 ND |
1591 | |
1592 | rtnl_link_failed: | |
1593 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); | |
1594 | xfrm_tunnel_failed: | |
1595 | unregister_pernet_device(&sit_net_ops); | |
1596 | goto out; | |
1da177e4 | 1597 | } |
989e5b96 JR |
1598 | |
1599 | module_init(sit_init); | |
1600 | module_exit(sit_cleanup); | |
39c85086 | 1601 | MODULE_LICENSE("GPL"); |
8909c9ad | 1602 | MODULE_ALIAS_NETDEV("sit0"); |