diff options
author | David S. Miller <davem@davemloft.net> | 2008-05-26 02:26:10 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-05-26 02:26:10 -0400 |
commit | 43154d08d6bb5c69aa0d0e3448fb348b4cd84e91 (patch) | |
tree | 176edb26aad2d33e8be36530b66b19d0603c4b1d /net/ipv4/ipip.c | |
parent | 03194379a77b02df3404ec4848a50c6784e9a8a5 (diff) | |
parent | 289c79a4bd350e8a25065102563ad1a183d1b402 (diff) |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/cpmac.c
net/mac80211/mlme.c
Diffstat (limited to 'net/ipv4/ipip.c')
-rw-r--r-- | net/ipv4/ipip.c | 130 |
1 files changed, 1 insertions, 129 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 26c85c23ca4f..86d8836551b9 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c | |||
@@ -278,9 +278,8 @@ static void ipip_tunnel_uninit(struct net_device *dev) | |||
278 | 278 | ||
279 | static int ipip_err(struct sk_buff *skb, u32 info) | 279 | static int ipip_err(struct sk_buff *skb, u32 info) |
280 | { | 280 | { |
281 | #ifndef I_WISH_WORLD_WERE_PERFECT | ||
282 | 281 | ||
283 | /* It is not :-( All the routers (except for Linux) return only | 282 | /* All the routers (except for Linux) return only |
284 | 8 bytes of packet payload. It means, that precise relaying of | 283 | 8 bytes of packet payload. It means, that precise relaying of |
285 | ICMP in the real Internet is absolutely infeasible. | 284 | ICMP in the real Internet is absolutely infeasible. |
286 | */ | 285 | */ |
@@ -337,133 +336,6 @@ static int ipip_err(struct sk_buff *skb, u32 info) | |||
337 | out: | 336 | out: |
338 | read_unlock(&ipip_lock); | 337 | read_unlock(&ipip_lock); |
339 | return err; | 338 | return err; |
340 | #else | ||
341 | struct iphdr *iph = (struct iphdr*)dp; | ||
342 | int hlen = iph->ihl<<2; | ||
343 | struct iphdr *eiph; | ||
344 | const int type = icmp_hdr(skb)->type; | ||
345 | const int code = icmp_hdr(skb)->code; | ||
346 | int rel_type = 0; | ||
347 | int rel_code = 0; | ||
348 | __be32 rel_info = 0; | ||
349 | __u32 n = 0; | ||
350 | struct sk_buff *skb2; | ||
351 | struct flowi fl; | ||
352 | struct rtable *rt; | ||
353 | |||
354 | if (len < hlen + sizeof(struct iphdr)) | ||
355 | return 0; | ||
356 | eiph = (struct iphdr*)(dp + hlen); | ||
357 | |||
358 | switch (type) { | ||
359 | default: | ||
360 | return 0; | ||
361 | case ICMP_PARAMETERPROB: | ||
362 | n = ntohl(icmp_hdr(skb)->un.gateway) >> 24; | ||
363 | if (n < hlen) | ||
364 | return 0; | ||
365 | |||
366 | /* So... This guy found something strange INSIDE encapsulated | ||
367 | packet. Well, he is fool, but what can we do ? | ||
368 | */ | ||
369 | rel_type = ICMP_PARAMETERPROB; | ||
370 | rel_info = htonl((n - hlen) << 24); | ||
371 | break; | ||
372 | |||
373 | case ICMP_DEST_UNREACH: | ||
374 | switch (code) { | ||
375 | case ICMP_SR_FAILED: | ||
376 | case ICMP_PORT_UNREACH: | ||
377 | /* Impossible event. */ | ||
378 | return 0; | ||
379 | case ICMP_FRAG_NEEDED: | ||
380 | /* And it is the only really necessary thing :-) */ | ||
381 | n = ntohs(icmp_hdr(skb)->un.frag.mtu); | ||
382 | if (n < hlen+68) | ||
383 | return 0; | ||
384 | n -= hlen; | ||
385 | /* BSD 4.2 MORE DOES NOT EXIST IN NATURE. */ | ||
386 | if (n > ntohs(eiph->tot_len)) | ||
387 | return 0; | ||
388 | rel_info = htonl(n); | ||
389 | break; | ||
390 | default: | ||
391 | /* All others are translated to HOST_UNREACH. | ||
392 | rfc2003 contains "deep thoughts" about NET_UNREACH, | ||
393 | I believe, it is just ether pollution. --ANK | ||
394 | */ | ||
395 | rel_type = ICMP_DEST_UNREACH; | ||
396 | rel_code = ICMP_HOST_UNREACH; | ||
397 | break; | ||
398 | } | ||
399 | break; | ||
400 | case ICMP_TIME_EXCEEDED: | ||
401 | if (code != ICMP_EXC_TTL) | ||
402 | return 0; | ||
403 | break; | ||
404 | } | ||
405 | |||
406 | /* Prepare fake skb to feed it to icmp_send */ | ||
407 | skb2 = skb_clone(skb, GFP_ATOMIC); | ||
408 | if (skb2 == NULL) | ||
409 | return 0; | ||
410 | dst_release(skb2->dst); | ||
411 | skb2->dst = NULL; | ||
412 | skb_pull(skb2, skb->data - (u8*)eiph); | ||
413 | skb_reset_network_header(skb2); | ||
414 | |||
415 | /* Try to guess incoming interface */ | ||
416 | memset(&fl, 0, sizeof(fl)); | ||
417 | fl.fl4_daddr = eiph->saddr; | ||
418 | fl.fl4_tos = RT_TOS(eiph->tos); | ||
419 | fl.proto = IPPROTO_IPIP; | ||
420 | if (ip_route_output_key(dev_net(skb->dev), &rt, &key)) { | ||
421 | kfree_skb(skb2); | ||
422 | return 0; | ||
423 | } | ||
424 | skb2->dev = rt->u.dst.dev; | ||
425 | |||
426 | /* route "incoming" packet */ | ||
427 | if (rt->rt_flags&RTCF_LOCAL) { | ||
428 | ip_rt_put(rt); | ||
429 | rt = NULL; | ||
430 | fl.fl4_daddr = eiph->daddr; | ||
431 | fl.fl4_src = eiph->saddr; | ||
432 | fl.fl4_tos = eiph->tos; | ||
433 | if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) || | ||
434 | rt->u.dst.dev->type != ARPHRD_TUNNEL) { | ||
435 | ip_rt_put(rt); | ||
436 | kfree_skb(skb2); | ||
437 | return 0; | ||
438 | } | ||
439 | } else { | ||
440 | ip_rt_put(rt); | ||
441 | if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, skb2->dev) || | ||
442 | skb2->dst->dev->type != ARPHRD_TUNNEL) { | ||
443 | kfree_skb(skb2); | ||
444 | return 0; | ||
445 | } | ||
446 | } | ||
447 | |||
448 | /* change mtu on this route */ | ||
449 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { | ||
450 | if (n > dst_mtu(skb2->dst)) { | ||
451 | kfree_skb(skb2); | ||
452 | return 0; | ||
453 | } | ||
454 | skb2->dst->ops->update_pmtu(skb2->dst, n); | ||
455 | } else if (type == ICMP_TIME_EXCEEDED) { | ||
456 | struct ip_tunnel *t = netdev_priv(skb2->dev); | ||
457 | if (t->parms.iph.ttl) { | ||
458 | rel_type = ICMP_DEST_UNREACH; | ||
459 | rel_code = ICMP_HOST_UNREACH; | ||
460 | } | ||
461 | } | ||
462 | |||
463 | icmp_send(skb2, rel_type, rel_code, rel_info); | ||
464 | kfree_skb(skb2); | ||
465 | return 0; | ||
466 | #endif | ||
467 | } | 339 | } |
468 | 340 | ||
469 | static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph, | 341 | static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph, |