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Commit | Line | Data |
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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 | * | |
9 | * $Id: sit.c,v 1.53 2001/09/25 05:09:53 davem Exp $ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * Changes: | |
17 | * Roger Venning <r.venning@telstra.com>: 6to4 support | |
18 | * Nate Thompson <nate@thebog.net>: 6to4 support | |
fadf6bf0 | 19 | * Fred Templin <fred.l.templin@boeing.com>: isatap support |
1da177e4 LT |
20 | */ |
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> | |
33 | #include <asm/uaccess.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/netfilter_ipv4.h> | |
46f25dff | 36 | #include <linux/if_ether.h> |
1da177e4 LT |
37 | |
38 | #include <net/sock.h> | |
39 | #include <net/snmp.h> | |
40 | ||
41 | #include <net/ipv6.h> | |
42 | #include <net/protocol.h> | |
43 | #include <net/transp_v6.h> | |
44 | #include <net/ip6_fib.h> | |
45 | #include <net/ip6_route.h> | |
46 | #include <net/ndisc.h> | |
47 | #include <net/addrconf.h> | |
48 | #include <net/ip.h> | |
49 | #include <net/udp.h> | |
50 | #include <net/icmp.h> | |
51 | #include <net/ipip.h> | |
52 | #include <net/inet_ecn.h> | |
53 | #include <net/xfrm.h> | |
54 | #include <net/dsfield.h> | |
55 | ||
56 | /* | |
57 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c | |
58 | ||
59 | For comments look at net/ipv4/ip_gre.c --ANK | |
60 | */ | |
61 | ||
62 | #define HASH_SIZE 16 | |
e69a4adc | 63 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
1da177e4 LT |
64 | |
65 | static int ipip6_fb_tunnel_init(struct net_device *dev); | |
66 | static int ipip6_tunnel_init(struct net_device *dev); | |
67 | static void ipip6_tunnel_setup(struct net_device *dev); | |
68 | ||
69 | static struct net_device *ipip6_fb_tunnel_dev; | |
70 | ||
71 | static struct ip_tunnel *tunnels_r_l[HASH_SIZE]; | |
72 | static struct ip_tunnel *tunnels_r[HASH_SIZE]; | |
73 | static struct ip_tunnel *tunnels_l[HASH_SIZE]; | |
74 | static struct ip_tunnel *tunnels_wc[1]; | |
75 | static struct ip_tunnel **tunnels[4] = { tunnels_wc, tunnels_l, tunnels_r, tunnels_r_l }; | |
76 | ||
77 | static DEFINE_RWLOCK(ipip6_lock); | |
78 | ||
e69a4adc | 79 | static struct ip_tunnel * ipip6_tunnel_lookup(__be32 remote, __be32 local) |
1da177e4 LT |
80 | { |
81 | unsigned h0 = HASH(remote); | |
82 | unsigned h1 = HASH(local); | |
83 | struct ip_tunnel *t; | |
84 | ||
85 | for (t = tunnels_r_l[h0^h1]; t; t = t->next) { | |
86 | if (local == t->parms.iph.saddr && | |
87 | remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) | |
88 | return t; | |
89 | } | |
90 | for (t = tunnels_r[h0]; t; t = t->next) { | |
91 | if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) | |
92 | return t; | |
93 | } | |
94 | for (t = tunnels_l[h1]; t; t = t->next) { | |
95 | if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP)) | |
96 | return t; | |
97 | } | |
98 | if ((t = tunnels_wc[0]) != NULL && (t->dev->flags&IFF_UP)) | |
99 | return t; | |
100 | return NULL; | |
101 | } | |
102 | ||
420fe234 | 103 | static struct ip_tunnel **__ipip6_bucket(struct ip_tunnel_parm *parms) |
1da177e4 | 104 | { |
420fe234 YH |
105 | __be32 remote = parms->iph.daddr; |
106 | __be32 local = parms->iph.saddr; | |
1da177e4 LT |
107 | unsigned h = 0; |
108 | int prio = 0; | |
109 | ||
110 | if (remote) { | |
111 | prio |= 2; | |
112 | h ^= HASH(remote); | |
113 | } | |
114 | if (local) { | |
115 | prio |= 1; | |
116 | h ^= HASH(local); | |
117 | } | |
118 | return &tunnels[prio][h]; | |
119 | } | |
120 | ||
420fe234 YH |
121 | static inline struct ip_tunnel **ipip6_bucket(struct ip_tunnel *t) |
122 | { | |
123 | return __ipip6_bucket(&t->parms); | |
124 | } | |
125 | ||
1da177e4 LT |
126 | static void ipip6_tunnel_unlink(struct ip_tunnel *t) |
127 | { | |
128 | struct ip_tunnel **tp; | |
129 | ||
130 | for (tp = ipip6_bucket(t); *tp; tp = &(*tp)->next) { | |
131 | if (t == *tp) { | |
132 | write_lock_bh(&ipip6_lock); | |
133 | *tp = t->next; | |
134 | write_unlock_bh(&ipip6_lock); | |
135 | break; | |
136 | } | |
137 | } | |
138 | } | |
139 | ||
140 | static void ipip6_tunnel_link(struct ip_tunnel *t) | |
141 | { | |
142 | struct ip_tunnel **tp = ipip6_bucket(t); | |
143 | ||
144 | t->next = *tp; | |
145 | write_lock_bh(&ipip6_lock); | |
146 | *tp = t; | |
147 | write_unlock_bh(&ipip6_lock); | |
148 | } | |
149 | ||
150 | static struct ip_tunnel * ipip6_tunnel_locate(struct ip_tunnel_parm *parms, int create) | |
151 | { | |
e69a4adc AV |
152 | __be32 remote = parms->iph.daddr; |
153 | __be32 local = parms->iph.saddr; | |
1da177e4 LT |
154 | struct ip_tunnel *t, **tp, *nt; |
155 | struct net_device *dev; | |
1da177e4 LT |
156 | char name[IFNAMSIZ]; |
157 | ||
420fe234 | 158 | for (tp = __ipip6_bucket(parms); (t = *tp) != NULL; tp = &t->next) { |
1da177e4 LT |
159 | if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) |
160 | return t; | |
161 | } | |
162 | if (!create) | |
163 | goto failed; | |
164 | ||
165 | if (parms->name[0]) | |
166 | strlcpy(name, parms->name, IFNAMSIZ); | |
34cc7ba6 PE |
167 | else |
168 | sprintf(name, "sit%%d"); | |
1da177e4 LT |
169 | |
170 | dev = alloc_netdev(sizeof(*t), name, ipip6_tunnel_setup); | |
171 | if (dev == NULL) | |
172 | return NULL; | |
173 | ||
b37d428b PE |
174 | if (strchr(name, '%')) { |
175 | if (dev_alloc_name(dev, name) < 0) | |
176 | goto failed_free; | |
177 | } | |
178 | ||
2941a486 | 179 | nt = netdev_priv(dev); |
1da177e4 LT |
180 | dev->init = ipip6_tunnel_init; |
181 | nt->parms = *parms; | |
182 | ||
c7dc89c0 FT |
183 | if (parms->i_flags & SIT_ISATAP) |
184 | dev->priv_flags |= IFF_ISATAP; | |
185 | ||
b37d428b PE |
186 | if (register_netdevice(dev) < 0) |
187 | goto failed_free; | |
1da177e4 LT |
188 | |
189 | dev_hold(dev); | |
190 | ||
191 | ipip6_tunnel_link(nt); | |
1da177e4 LT |
192 | return nt; |
193 | ||
b37d428b PE |
194 | failed_free: |
195 | free_netdev(dev); | |
1da177e4 LT |
196 | failed: |
197 | return NULL; | |
198 | } | |
199 | ||
fadf6bf0 | 200 | static struct ip_tunnel_prl_entry * |
3fcfa129 | 201 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
fadf6bf0 TF |
202 | { |
203 | struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *)NULL; | |
204 | ||
205 | for (p = t->prl; p; p = p->next) | |
206 | if (p->entry.addr == addr) | |
207 | break; | |
208 | return p; | |
209 | ||
210 | } | |
211 | ||
212 | static int | |
213 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) | |
214 | { | |
215 | struct ip_tunnel_prl_entry *p; | |
3fcfa129 YH |
216 | int err = 0; |
217 | ||
0009ae1f YH |
218 | if (a->addr == htonl(INADDR_ANY)) |
219 | return -EINVAL; | |
220 | ||
3fcfa129 | 221 | write_lock(&ipip6_lock); |
fadf6bf0 TF |
222 | |
223 | for (p = t->prl; p; p = p->next) { | |
224 | if (p->entry.addr == a->addr) { | |
3fcfa129 YH |
225 | if (chg) |
226 | goto update; | |
227 | err = -EEXIST; | |
228 | goto out; | |
fadf6bf0 TF |
229 | } |
230 | } | |
231 | ||
3fcfa129 YH |
232 | if (chg) { |
233 | err = -ENXIO; | |
234 | goto out; | |
235 | } | |
fadf6bf0 TF |
236 | |
237 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); | |
3fcfa129 YH |
238 | if (!p) { |
239 | err = -ENOBUFS; | |
240 | goto out; | |
241 | } | |
fadf6bf0 | 242 | |
fadf6bf0 TF |
243 | p->next = t->prl; |
244 | t->prl = p; | |
3fcfa129 YH |
245 | update: |
246 | p->entry = *a; | |
247 | out: | |
248 | write_unlock(&ipip6_lock); | |
249 | return err; | |
fadf6bf0 TF |
250 | } |
251 | ||
252 | static int | |
253 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) | |
254 | { | |
255 | struct ip_tunnel_prl_entry *x, **p; | |
3fcfa129 YH |
256 | int err = 0; |
257 | ||
258 | write_lock(&ipip6_lock); | |
fadf6bf0 | 259 | |
0009ae1f | 260 | if (a && a->addr != htonl(INADDR_ANY)) { |
fadf6bf0 TF |
261 | for (p = &t->prl; *p; p = &(*p)->next) { |
262 | if ((*p)->entry.addr == a->addr) { | |
263 | x = *p; | |
264 | *p = x->next; | |
265 | kfree(x); | |
3fcfa129 | 266 | goto out; |
fadf6bf0 TF |
267 | } |
268 | } | |
3fcfa129 | 269 | err = -ENXIO; |
fadf6bf0 TF |
270 | } else { |
271 | while (t->prl) { | |
272 | x = t->prl; | |
273 | t->prl = t->prl->next; | |
274 | kfree(x); | |
275 | } | |
276 | } | |
3fcfa129 YH |
277 | out: |
278 | write_unlock(&ipip6_lock); | |
fadf6bf0 TF |
279 | return 0; |
280 | } | |
281 | ||
282 | /* copied directly from anycast.c */ | |
283 | static int | |
284 | ipip6_onlink(struct in6_addr *addr, struct net_device *dev) | |
285 | { | |
286 | struct inet6_dev *idev; | |
287 | struct inet6_ifaddr *ifa; | |
288 | int onlink; | |
289 | ||
290 | onlink = 0; | |
291 | rcu_read_lock(); | |
292 | idev = __in6_dev_get(dev); | |
293 | if (idev) { | |
294 | read_lock_bh(&idev->lock); | |
295 | for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) { | |
296 | onlink = ipv6_prefix_equal(addr, &ifa->addr, | |
297 | ifa->prefix_len); | |
298 | if (onlink) | |
299 | break; | |
300 | } | |
301 | read_unlock_bh(&idev->lock); | |
302 | } | |
303 | rcu_read_unlock(); | |
304 | return onlink; | |
305 | } | |
306 | ||
307 | static int | |
308 | isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t) | |
309 | { | |
3fcfa129 | 310 | struct ip_tunnel_prl_entry *p; |
fadf6bf0 TF |
311 | int ok = 1; |
312 | ||
3fcfa129 YH |
313 | read_lock(&ipip6_lock); |
314 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); | |
fadf6bf0 TF |
315 | if (p) { |
316 | if (p->entry.flags & PRL_DEFAULT) | |
317 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; | |
318 | else | |
319 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; | |
320 | } else { | |
321 | struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; | |
322 | if (ipv6_addr_is_isatap(addr6) && | |
323 | (addr6->s6_addr32[3] == iph->saddr) && | |
324 | ipip6_onlink(addr6, t->dev)) | |
325 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; | |
326 | else | |
327 | ok = 0; | |
328 | } | |
3fcfa129 | 329 | read_unlock(&ipip6_lock); |
fadf6bf0 TF |
330 | return ok; |
331 | } | |
332 | ||
1da177e4 LT |
333 | static void ipip6_tunnel_uninit(struct net_device *dev) |
334 | { | |
335 | if (dev == ipip6_fb_tunnel_dev) { | |
336 | write_lock_bh(&ipip6_lock); | |
337 | tunnels_wc[0] = NULL; | |
338 | write_unlock_bh(&ipip6_lock); | |
339 | dev_put(dev); | |
340 | } else { | |
2941a486 | 341 | ipip6_tunnel_unlink(netdev_priv(dev)); |
fadf6bf0 | 342 | ipip6_tunnel_del_prl(netdev_priv(dev), 0); |
1da177e4 LT |
343 | dev_put(dev); |
344 | } | |
345 | } | |
346 | ||
347 | ||
c73cb5a2 | 348 | static int ipip6_err(struct sk_buff *skb, u32 info) |
1da177e4 LT |
349 | { |
350 | #ifndef I_WISH_WORLD_WERE_PERFECT | |
351 | ||
352 | /* It is not :-( All the routers (except for Linux) return only | |
353 | 8 bytes of packet payload. It means, that precise relaying of | |
354 | ICMP in the real Internet is absolutely infeasible. | |
355 | */ | |
356 | struct iphdr *iph = (struct iphdr*)skb->data; | |
88c7664f ACM |
357 | const int type = icmp_hdr(skb)->type; |
358 | const int code = icmp_hdr(skb)->code; | |
1da177e4 | 359 | struct ip_tunnel *t; |
c73cb5a2 | 360 | int err; |
1da177e4 LT |
361 | |
362 | switch (type) { | |
363 | default: | |
364 | case ICMP_PARAMETERPROB: | |
c73cb5a2 | 365 | return 0; |
1da177e4 LT |
366 | |
367 | case ICMP_DEST_UNREACH: | |
368 | switch (code) { | |
369 | case ICMP_SR_FAILED: | |
370 | case ICMP_PORT_UNREACH: | |
371 | /* Impossible event. */ | |
c73cb5a2 | 372 | return 0; |
1da177e4 LT |
373 | case ICMP_FRAG_NEEDED: |
374 | /* Soft state for pmtu is maintained by IP core. */ | |
c73cb5a2 | 375 | return 0; |
1da177e4 LT |
376 | default: |
377 | /* All others are translated to HOST_UNREACH. | |
378 | rfc2003 contains "deep thoughts" about NET_UNREACH, | |
379 | I believe they are just ether pollution. --ANK | |
380 | */ | |
381 | break; | |
382 | } | |
383 | break; | |
384 | case ICMP_TIME_EXCEEDED: | |
385 | if (code != ICMP_EXC_TTL) | |
c73cb5a2 | 386 | return 0; |
1da177e4 LT |
387 | break; |
388 | } | |
389 | ||
c73cb5a2 KM |
390 | err = -ENOENT; |
391 | ||
1da177e4 LT |
392 | read_lock(&ipip6_lock); |
393 | t = ipip6_tunnel_lookup(iph->daddr, iph->saddr); | |
394 | if (t == NULL || t->parms.iph.daddr == 0) | |
395 | goto out; | |
c73cb5a2 KM |
396 | |
397 | err = 0; | |
1da177e4 LT |
398 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
399 | goto out; | |
400 | ||
401 | if (jiffies - t->err_time < IPTUNNEL_ERR_TIMEO) | |
402 | t->err_count++; | |
403 | else | |
404 | t->err_count = 1; | |
405 | t->err_time = jiffies; | |
406 | out: | |
407 | read_unlock(&ipip6_lock); | |
c73cb5a2 | 408 | return err; |
1da177e4 LT |
409 | #else |
410 | struct iphdr *iph = (struct iphdr*)dp; | |
411 | int hlen = iph->ihl<<2; | |
412 | struct ipv6hdr *iph6; | |
88c7664f ACM |
413 | const int type = icmp_hdr(skb)->type; |
414 | const int code = icmp_hdr(skb)->code; | |
1da177e4 LT |
415 | int rel_type = 0; |
416 | int rel_code = 0; | |
417 | int rel_info = 0; | |
418 | struct sk_buff *skb2; | |
419 | struct rt6_info *rt6i; | |
420 | ||
421 | if (len < hlen + sizeof(struct ipv6hdr)) | |
422 | return; | |
423 | iph6 = (struct ipv6hdr*)(dp + hlen); | |
424 | ||
425 | switch (type) { | |
426 | default: | |
427 | return; | |
428 | case ICMP_PARAMETERPROB: | |
88c7664f | 429 | if (icmp_hdr(skb)->un.gateway < hlen) |
1da177e4 LT |
430 | return; |
431 | ||
432 | /* So... This guy found something strange INSIDE encapsulated | |
433 | packet. Well, he is fool, but what can we do ? | |
434 | */ | |
435 | rel_type = ICMPV6_PARAMPROB; | |
88c7664f | 436 | rel_info = icmp_hdr(skb)->un.gateway - hlen; |
1da177e4 LT |
437 | break; |
438 | ||
439 | case ICMP_DEST_UNREACH: | |
440 | switch (code) { | |
441 | case ICMP_SR_FAILED: | |
442 | case ICMP_PORT_UNREACH: | |
443 | /* Impossible event. */ | |
444 | return; | |
445 | case ICMP_FRAG_NEEDED: | |
446 | /* Too complicated case ... */ | |
447 | return; | |
448 | default: | |
449 | /* All others are translated to HOST_UNREACH. | |
450 | rfc2003 contains "deep thoughts" about NET_UNREACH, | |
451 | I believe, it is just ether pollution. --ANK | |
452 | */ | |
453 | rel_type = ICMPV6_DEST_UNREACH; | |
454 | rel_code = ICMPV6_ADDR_UNREACH; | |
455 | break; | |
456 | } | |
457 | break; | |
458 | case ICMP_TIME_EXCEEDED: | |
459 | if (code != ICMP_EXC_TTL) | |
460 | return; | |
461 | rel_type = ICMPV6_TIME_EXCEED; | |
462 | rel_code = ICMPV6_EXC_HOPLIMIT; | |
463 | break; | |
464 | } | |
465 | ||
466 | /* Prepare fake skb to feed it to icmpv6_send */ | |
467 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
468 | if (skb2 == NULL) | |
c73cb5a2 | 469 | return 0; |
1da177e4 LT |
470 | dst_release(skb2->dst); |
471 | skb2->dst = NULL; | |
472 | skb_pull(skb2, skb->data - (u8*)iph6); | |
c1d2bbe1 | 473 | skb_reset_network_header(skb2); |
1da177e4 LT |
474 | |
475 | /* Try to guess incoming interface */ | |
606a2b48 | 476 | rt6i = rt6_lookup(&init_net, &iph6->saddr, NULL, NULL, 0); |
1da177e4 LT |
477 | if (rt6i && rt6i->rt6i_dev) { |
478 | skb2->dev = rt6i->rt6i_dev; | |
479 | ||
606a2b48 | 480 | rt6i = rt6_lookup(&init_net, &iph6->daddr, &iph6->saddr, NULL, 0); |
1da177e4 LT |
481 | |
482 | if (rt6i && rt6i->rt6i_dev && rt6i->rt6i_dev->type == ARPHRD_SIT) { | |
2941a486 | 483 | struct ip_tunnel *t = netdev_priv(rt6i->rt6i_dev); |
1da177e4 LT |
484 | if (rel_type == ICMPV6_TIME_EXCEED && t->parms.iph.ttl) { |
485 | rel_type = ICMPV6_DEST_UNREACH; | |
486 | rel_code = ICMPV6_ADDR_UNREACH; | |
487 | } | |
488 | icmpv6_send(skb2, rel_type, rel_code, rel_info, skb2->dev); | |
489 | } | |
490 | } | |
491 | kfree_skb(skb2); | |
c73cb5a2 | 492 | return 0; |
1da177e4 LT |
493 | #endif |
494 | } | |
495 | ||
496 | static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb) | |
497 | { | |
498 | if (INET_ECN_is_ce(iph->tos)) | |
0660e03f | 499 | IP6_ECN_set_ce(ipv6_hdr(skb)); |
1da177e4 LT |
500 | } |
501 | ||
502 | static int ipip6_rcv(struct sk_buff *skb) | |
503 | { | |
504 | struct iphdr *iph; | |
505 | struct ip_tunnel *tunnel; | |
506 | ||
507 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
508 | goto out; | |
509 | ||
eddc9ec5 | 510 | iph = ip_hdr(skb); |
1da177e4 LT |
511 | |
512 | read_lock(&ipip6_lock); | |
513 | if ((tunnel = ipip6_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) { | |
514 | secpath_reset(skb); | |
b0e380b1 | 515 | skb->mac_header = skb->network_header; |
c1d2bbe1 | 516 | skb_reset_network_header(skb); |
8cdfab8a | 517 | IPCB(skb)->flags = 0; |
1da177e4 LT |
518 | skb->protocol = htons(ETH_P_IPV6); |
519 | skb->pkt_type = PACKET_HOST; | |
c7dc89c0 FT |
520 | |
521 | if ((tunnel->dev->priv_flags & IFF_ISATAP) && | |
fadf6bf0 | 522 | !isatap_chksrc(skb, iph, tunnel)) { |
c7dc89c0 FT |
523 | tunnel->stat.rx_errors++; |
524 | read_unlock(&ipip6_lock); | |
525 | kfree_skb(skb); | |
526 | return 0; | |
527 | } | |
1da177e4 LT |
528 | tunnel->stat.rx_packets++; |
529 | tunnel->stat.rx_bytes += skb->len; | |
530 | skb->dev = tunnel->dev; | |
531 | dst_release(skb->dst); | |
532 | skb->dst = NULL; | |
533 | nf_reset(skb); | |
534 | ipip6_ecn_decapsulate(iph, skb); | |
535 | netif_rx(skb); | |
536 | read_unlock(&ipip6_lock); | |
537 | return 0; | |
538 | } | |
539 | ||
45af08be | 540 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); |
1da177e4 LT |
541 | kfree_skb(skb); |
542 | read_unlock(&ipip6_lock); | |
543 | out: | |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* Returns the embedded IPv4 address if the IPv6 address | |
548 | comes from 6to4 (RFC 3056) addr space */ | |
549 | ||
e69a4adc | 550 | static inline __be32 try_6to4(struct in6_addr *v6dst) |
1da177e4 | 551 | { |
e69a4adc | 552 | __be32 dst = 0; |
1da177e4 LT |
553 | |
554 | if (v6dst->s6_addr16[0] == htons(0x2002)) { | |
1ab1457c | 555 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
1da177e4 LT |
556 | memcpy(&dst, &v6dst->s6_addr16[1], 4); |
557 | } | |
558 | return dst; | |
559 | } | |
560 | ||
561 | /* | |
562 | * This function assumes it is being called from dev_queue_xmit() | |
563 | * and that skb is filled properly by that function. | |
564 | */ | |
565 | ||
566 | static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) | |
567 | { | |
2941a486 | 568 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4 LT |
569 | struct net_device_stats *stats = &tunnel->stat; |
570 | struct iphdr *tiph = &tunnel->parms.iph; | |
0660e03f | 571 | struct ipv6hdr *iph6 = ipv6_hdr(skb); |
1da177e4 LT |
572 | u8 tos = tunnel->parms.iph.tos; |
573 | struct rtable *rt; /* Route to the other host */ | |
574 | struct net_device *tdev; /* Device to other host */ | |
575 | struct iphdr *iph; /* Our new IP header */ | |
c2636b4d | 576 | unsigned int max_headroom; /* The extra header space needed */ |
e69a4adc | 577 | __be32 dst = tiph->daddr; |
1da177e4 | 578 | int mtu; |
1ab1457c | 579 | struct in6_addr *addr6; |
1da177e4 LT |
580 | int addr_type; |
581 | ||
582 | if (tunnel->recursion++) { | |
583 | tunnel->stat.collisions++; | |
584 | goto tx_error; | |
585 | } | |
586 | ||
587 | if (skb->protocol != htons(ETH_P_IPV6)) | |
588 | goto tx_error; | |
589 | ||
c7dc89c0 FT |
590 | /* ISATAP (RFC4214) - must come before 6to4 */ |
591 | if (dev->priv_flags & IFF_ISATAP) { | |
592 | struct neighbour *neigh = NULL; | |
593 | ||
594 | if (skb->dst) | |
595 | neigh = skb->dst->neighbour; | |
596 | ||
597 | if (neigh == NULL) { | |
598 | if (net_ratelimit()) | |
599 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); | |
600 | goto tx_error; | |
601 | } | |
602 | ||
603 | addr6 = (struct in6_addr*)&neigh->primary_key; | |
604 | addr_type = ipv6_addr_type(addr6); | |
605 | ||
606 | if ((addr_type & IPV6_ADDR_UNICAST) && | |
607 | ipv6_addr_is_isatap(addr6)) | |
608 | dst = addr6->s6_addr32[3]; | |
609 | else | |
610 | goto tx_error; | |
611 | } | |
612 | ||
1da177e4 LT |
613 | if (!dst) |
614 | dst = try_6to4(&iph6->daddr); | |
615 | ||
616 | if (!dst) { | |
617 | struct neighbour *neigh = NULL; | |
618 | ||
619 | if (skb->dst) | |
620 | neigh = skb->dst->neighbour; | |
621 | ||
622 | if (neigh == NULL) { | |
623 | if (net_ratelimit()) | |
624 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); | |
625 | goto tx_error; | |
626 | } | |
627 | ||
628 | addr6 = (struct in6_addr*)&neigh->primary_key; | |
629 | addr_type = ipv6_addr_type(addr6); | |
630 | ||
631 | if (addr_type == IPV6_ADDR_ANY) { | |
0660e03f | 632 | addr6 = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
633 | addr_type = ipv6_addr_type(addr6); |
634 | } | |
635 | ||
636 | if ((addr_type & IPV6_ADDR_COMPATv4) == 0) | |
637 | goto tx_error_icmp; | |
638 | ||
639 | dst = addr6->s6_addr32[3]; | |
640 | } | |
641 | ||
642 | { | |
643 | struct flowi fl = { .nl_u = { .ip4_u = | |
644 | { .daddr = dst, | |
645 | .saddr = tiph->saddr, | |
646 | .tos = RT_TOS(tos) } }, | |
647 | .oif = tunnel->parms.link, | |
648 | .proto = IPPROTO_IPV6 }; | |
f206351a | 649 | if (ip_route_output_key(&init_net, &rt, &fl)) { |
1da177e4 LT |
650 | tunnel->stat.tx_carrier_errors++; |
651 | goto tx_error_icmp; | |
652 | } | |
653 | } | |
654 | if (rt->rt_type != RTN_UNICAST) { | |
655 | ip_rt_put(rt); | |
656 | tunnel->stat.tx_carrier_errors++; | |
657 | goto tx_error_icmp; | |
658 | } | |
659 | tdev = rt->u.dst.dev; | |
660 | ||
661 | if (tdev == dev) { | |
662 | ip_rt_put(rt); | |
663 | tunnel->stat.collisions++; | |
664 | goto tx_error; | |
665 | } | |
666 | ||
667 | if (tiph->frag_off) | |
668 | mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr); | |
669 | else | |
670 | mtu = skb->dst ? dst_mtu(skb->dst) : dev->mtu; | |
671 | ||
672 | if (mtu < 68) { | |
673 | tunnel->stat.collisions++; | |
674 | ip_rt_put(rt); | |
675 | goto tx_error; | |
676 | } | |
677 | if (mtu < IPV6_MIN_MTU) | |
678 | mtu = IPV6_MIN_MTU; | |
679 | if (tunnel->parms.iph.daddr && skb->dst) | |
680 | skb->dst->ops->update_pmtu(skb->dst, mtu); | |
681 | ||
682 | if (skb->len > mtu) { | |
683 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev); | |
684 | ip_rt_put(rt); | |
685 | goto tx_error; | |
686 | } | |
687 | ||
688 | if (tunnel->err_count > 0) { | |
689 | if (jiffies - tunnel->err_time < IPTUNNEL_ERR_TIMEO) { | |
690 | tunnel->err_count--; | |
691 | dst_link_failure(skb); | |
692 | } else | |
693 | tunnel->err_count = 0; | |
694 | } | |
695 | ||
696 | /* | |
697 | * Okay, now see if we can stuff it in the buffer as-is. | |
698 | */ | |
699 | max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); | |
700 | ||
cfbba49d PM |
701 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
702 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { | |
1da177e4 LT |
703 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
704 | if (!new_skb) { | |
705 | ip_rt_put(rt); | |
1ab1457c | 706 | stats->tx_dropped++; |
1da177e4 LT |
707 | dev_kfree_skb(skb); |
708 | tunnel->recursion--; | |
709 | return 0; | |
710 | } | |
711 | if (skb->sk) | |
712 | skb_set_owner_w(new_skb, skb->sk); | |
713 | dev_kfree_skb(skb); | |
714 | skb = new_skb; | |
0660e03f | 715 | iph6 = ipv6_hdr(skb); |
1da177e4 LT |
716 | } |
717 | ||
b0e380b1 | 718 | skb->transport_header = skb->network_header; |
e2d1bca7 ACM |
719 | skb_push(skb, sizeof(struct iphdr)); |
720 | skb_reset_network_header(skb); | |
1da177e4 | 721 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
8cdfab8a | 722 | IPCB(skb)->flags = 0; |
1da177e4 LT |
723 | dst_release(skb->dst); |
724 | skb->dst = &rt->u.dst; | |
725 | ||
726 | /* | |
727 | * Push down and install the IPIP header. | |
728 | */ | |
729 | ||
eddc9ec5 | 730 | iph = ip_hdr(skb); |
1da177e4 LT |
731 | iph->version = 4; |
732 | iph->ihl = sizeof(struct iphdr)>>2; | |
733 | if (mtu > IPV6_MIN_MTU) | |
734 | iph->frag_off = htons(IP_DF); | |
735 | else | |
736 | iph->frag_off = 0; | |
737 | ||
738 | iph->protocol = IPPROTO_IPV6; | |
739 | iph->tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); | |
740 | iph->daddr = rt->rt_dst; | |
741 | iph->saddr = rt->rt_src; | |
742 | ||
743 | if ((iph->ttl = tiph->ttl) == 0) | |
744 | iph->ttl = iph6->hop_limit; | |
745 | ||
746 | nf_reset(skb); | |
747 | ||
748 | IPTUNNEL_XMIT(); | |
749 | tunnel->recursion--; | |
750 | return 0; | |
751 | ||
752 | tx_error_icmp: | |
753 | dst_link_failure(skb); | |
754 | tx_error: | |
755 | stats->tx_errors++; | |
756 | dev_kfree_skb(skb); | |
757 | tunnel->recursion--; | |
758 | return 0; | |
759 | } | |
760 | ||
8a4a50f9 MS |
761 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
762 | { | |
763 | struct net_device *tdev = NULL; | |
764 | struct ip_tunnel *tunnel; | |
765 | struct iphdr *iph; | |
766 | ||
767 | tunnel = netdev_priv(dev); | |
768 | iph = &tunnel->parms.iph; | |
769 | ||
770 | if (iph->daddr) { | |
771 | struct flowi fl = { .nl_u = { .ip4_u = | |
772 | { .daddr = iph->daddr, | |
773 | .saddr = iph->saddr, | |
774 | .tos = RT_TOS(iph->tos) } }, | |
775 | .oif = tunnel->parms.link, | |
776 | .proto = IPPROTO_IPV6 }; | |
777 | struct rtable *rt; | |
f206351a | 778 | if (!ip_route_output_key(&init_net, &rt, &fl)) { |
8a4a50f9 MS |
779 | tdev = rt->u.dst.dev; |
780 | ip_rt_put(rt); | |
781 | } | |
782 | dev->flags |= IFF_POINTOPOINT; | |
783 | } | |
784 | ||
785 | if (!tdev && tunnel->parms.link) | |
786 | tdev = __dev_get_by_index(&init_net, tunnel->parms.link); | |
787 | ||
788 | if (tdev) { | |
789 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); | |
790 | dev->mtu = tdev->mtu - sizeof(struct iphdr); | |
791 | if (dev->mtu < IPV6_MIN_MTU) | |
792 | dev->mtu = IPV6_MIN_MTU; | |
793 | } | |
794 | dev->iflink = tunnel->parms.link; | |
795 | } | |
796 | ||
1da177e4 LT |
797 | static int |
798 | ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) | |
799 | { | |
800 | int err = 0; | |
801 | struct ip_tunnel_parm p; | |
fadf6bf0 | 802 | struct ip_tunnel_prl prl; |
1da177e4 LT |
803 | struct ip_tunnel *t; |
804 | ||
805 | switch (cmd) { | |
806 | case SIOCGETTUNNEL: | |
807 | t = NULL; | |
808 | if (dev == ipip6_fb_tunnel_dev) { | |
809 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { | |
810 | err = -EFAULT; | |
811 | break; | |
812 | } | |
813 | t = ipip6_tunnel_locate(&p, 0); | |
814 | } | |
815 | if (t == NULL) | |
2941a486 | 816 | t = netdev_priv(dev); |
1da177e4 LT |
817 | memcpy(&p, &t->parms, sizeof(p)); |
818 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) | |
819 | err = -EFAULT; | |
820 | break; | |
821 | ||
822 | case SIOCADDTUNNEL: | |
823 | case SIOCCHGTUNNEL: | |
824 | err = -EPERM; | |
825 | if (!capable(CAP_NET_ADMIN)) | |
826 | goto done; | |
827 | ||
828 | err = -EFAULT; | |
829 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
830 | goto done; | |
831 | ||
832 | err = -EINVAL; | |
833 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPV6 || | |
834 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) | |
835 | goto done; | |
836 | if (p.iph.ttl) | |
837 | p.iph.frag_off |= htons(IP_DF); | |
838 | ||
839 | t = ipip6_tunnel_locate(&p, cmd == SIOCADDTUNNEL); | |
840 | ||
841 | if (dev != ipip6_fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { | |
842 | if (t != NULL) { | |
843 | if (t->dev != dev) { | |
844 | err = -EEXIST; | |
845 | break; | |
846 | } | |
847 | } else { | |
848 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || | |
849 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { | |
850 | err = -EINVAL; | |
851 | break; | |
852 | } | |
2941a486 | 853 | t = netdev_priv(dev); |
1da177e4 LT |
854 | ipip6_tunnel_unlink(t); |
855 | t->parms.iph.saddr = p.iph.saddr; | |
856 | t->parms.iph.daddr = p.iph.daddr; | |
857 | memcpy(dev->dev_addr, &p.iph.saddr, 4); | |
858 | memcpy(dev->broadcast, &p.iph.daddr, 4); | |
859 | ipip6_tunnel_link(t); | |
860 | netdev_state_change(dev); | |
861 | } | |
862 | } | |
863 | ||
864 | if (t) { | |
865 | err = 0; | |
866 | if (cmd == SIOCCHGTUNNEL) { | |
867 | t->parms.iph.ttl = p.iph.ttl; | |
868 | t->parms.iph.tos = p.iph.tos; | |
8a4a50f9 MS |
869 | if (t->parms.link != p.link) { |
870 | t->parms.link = p.link; | |
871 | ipip6_tunnel_bind_dev(dev); | |
872 | netdev_state_change(dev); | |
873 | } | |
1da177e4 LT |
874 | } |
875 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) | |
876 | err = -EFAULT; | |
877 | } else | |
878 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); | |
879 | break; | |
880 | ||
881 | case SIOCDELTUNNEL: | |
882 | err = -EPERM; | |
883 | if (!capable(CAP_NET_ADMIN)) | |
884 | goto done; | |
885 | ||
886 | if (dev == ipip6_fb_tunnel_dev) { | |
887 | err = -EFAULT; | |
888 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
889 | goto done; | |
890 | err = -ENOENT; | |
891 | if ((t = ipip6_tunnel_locate(&p, 0)) == NULL) | |
892 | goto done; | |
893 | err = -EPERM; | |
2941a486 | 894 | if (t == netdev_priv(ipip6_fb_tunnel_dev)) |
1da177e4 LT |
895 | goto done; |
896 | dev = t->dev; | |
897 | } | |
22f8cde5 SH |
898 | unregister_netdevice(dev); |
899 | err = 0; | |
1da177e4 LT |
900 | break; |
901 | ||
fadf6bf0 TF |
902 | case SIOCADDPRL: |
903 | case SIOCDELPRL: | |
904 | case SIOCCHGPRL: | |
905 | err = -EPERM; | |
906 | if (!capable(CAP_NET_ADMIN)) | |
907 | goto done; | |
908 | err = -EINVAL; | |
909 | if (dev == ipip6_fb_tunnel_dev) | |
910 | goto done; | |
911 | err = -EFAULT; | |
912 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) | |
913 | goto done; | |
914 | err = -ENOENT; | |
915 | if (!(t = netdev_priv(dev))) | |
916 | goto done; | |
917 | ||
fadf6bf0 TF |
918 | if (cmd == SIOCDELPRL) |
919 | err = ipip6_tunnel_del_prl(t, &prl); | |
920 | else | |
921 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); | |
fadf6bf0 TF |
922 | netdev_state_change(dev); |
923 | break; | |
924 | ||
1da177e4 LT |
925 | default: |
926 | err = -EINVAL; | |
927 | } | |
928 | ||
929 | done: | |
930 | return err; | |
931 | } | |
932 | ||
933 | static struct net_device_stats *ipip6_tunnel_get_stats(struct net_device *dev) | |
934 | { | |
2941a486 | 935 | return &(((struct ip_tunnel*)netdev_priv(dev))->stat); |
1da177e4 LT |
936 | } |
937 | ||
938 | static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) | |
939 | { | |
940 | if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - sizeof(struct iphdr)) | |
941 | return -EINVAL; | |
942 | dev->mtu = new_mtu; | |
943 | return 0; | |
944 | } | |
945 | ||
946 | static void ipip6_tunnel_setup(struct net_device *dev) | |
947 | { | |
1da177e4 LT |
948 | dev->uninit = ipip6_tunnel_uninit; |
949 | dev->destructor = free_netdev; | |
950 | dev->hard_start_xmit = ipip6_tunnel_xmit; | |
951 | dev->get_stats = ipip6_tunnel_get_stats; | |
952 | dev->do_ioctl = ipip6_tunnel_ioctl; | |
953 | dev->change_mtu = ipip6_tunnel_change_mtu; | |
954 | ||
955 | dev->type = ARPHRD_SIT; | |
956 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); | |
46f25dff | 957 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
1da177e4 LT |
958 | dev->flags = IFF_NOARP; |
959 | dev->iflink = 0; | |
960 | dev->addr_len = 4; | |
961 | } | |
962 | ||
963 | static int ipip6_tunnel_init(struct net_device *dev) | |
964 | { | |
1da177e4 | 965 | struct ip_tunnel *tunnel; |
1da177e4 | 966 | |
2941a486 | 967 | tunnel = netdev_priv(dev); |
1da177e4 LT |
968 | |
969 | tunnel->dev = dev; | |
970 | strcpy(tunnel->parms.name, dev->name); | |
971 | ||
972 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); | |
973 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); | |
974 | ||
8a4a50f9 | 975 | ipip6_tunnel_bind_dev(dev); |
1da177e4 LT |
976 | |
977 | return 0; | |
978 | } | |
979 | ||
20380731 | 980 | static int __init ipip6_fb_tunnel_init(struct net_device *dev) |
1da177e4 | 981 | { |
2941a486 | 982 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4 LT |
983 | struct iphdr *iph = &tunnel->parms.iph; |
984 | ||
985 | tunnel->dev = dev; | |
986 | strcpy(tunnel->parms.name, dev->name); | |
987 | ||
988 | iph->version = 4; | |
989 | iph->protocol = IPPROTO_IPV6; | |
990 | iph->ihl = 5; | |
991 | iph->ttl = 64; | |
992 | ||
993 | dev_hold(dev); | |
994 | tunnels_wc[0] = tunnel; | |
995 | return 0; | |
996 | } | |
997 | ||
c73cb5a2 | 998 | static struct xfrm_tunnel sit_handler = { |
1da177e4 LT |
999 | .handler = ipip6_rcv, |
1000 | .err_handler = ipip6_err, | |
c73cb5a2 | 1001 | .priority = 1, |
1da177e4 LT |
1002 | }; |
1003 | ||
db44575f AK |
1004 | static void __exit sit_destroy_tunnels(void) |
1005 | { | |
1006 | int prio; | |
1007 | ||
1008 | for (prio = 1; prio < 4; prio++) { | |
1009 | int h; | |
1010 | for (h = 0; h < HASH_SIZE; h++) { | |
1011 | struct ip_tunnel *t; | |
1012 | while ((t = tunnels[prio][h]) != NULL) | |
1013 | unregister_netdevice(t->dev); | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
89c89458 | 1018 | static void __exit sit_cleanup(void) |
1da177e4 | 1019 | { |
c73cb5a2 | 1020 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
db44575f AK |
1021 | |
1022 | rtnl_lock(); | |
1023 | sit_destroy_tunnels(); | |
1024 | unregister_netdevice(ipip6_fb_tunnel_dev); | |
1025 | rtnl_unlock(); | |
1da177e4 LT |
1026 | } |
1027 | ||
89c89458 | 1028 | static int __init sit_init(void) |
1da177e4 LT |
1029 | { |
1030 | int err; | |
1031 | ||
1032 | printk(KERN_INFO "IPv6 over IPv4 tunneling driver\n"); | |
1033 | ||
c73cb5a2 | 1034 | if (xfrm4_tunnel_register(&sit_handler, AF_INET6) < 0) { |
1da177e4 LT |
1035 | printk(KERN_INFO "sit init: Can't add protocol\n"); |
1036 | return -EAGAIN; | |
1037 | } | |
1038 | ||
1ab1457c | 1039 | ipip6_fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
1da177e4 LT |
1040 | ipip6_tunnel_setup); |
1041 | if (!ipip6_fb_tunnel_dev) { | |
1042 | err = -ENOMEM; | |
1043 | goto err1; | |
1044 | } | |
1045 | ||
1046 | ipip6_fb_tunnel_dev->init = ipip6_fb_tunnel_init; | |
1047 | ||
1048 | if ((err = register_netdev(ipip6_fb_tunnel_dev))) | |
1049 | goto err2; | |
1050 | ||
1051 | out: | |
1052 | return err; | |
1053 | err2: | |
1054 | free_netdev(ipip6_fb_tunnel_dev); | |
1055 | err1: | |
c73cb5a2 | 1056 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
1da177e4 LT |
1057 | goto out; |
1058 | } | |
989e5b96 JR |
1059 | |
1060 | module_init(sit_init); | |
1061 | module_exit(sit_cleanup); | |
39c85086 | 1062 | MODULE_LICENSE("GPL"); |
daccff02 | 1063 | MODULE_ALIAS("sit0"); |