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Commit 107a5fe6 authored by Ville Nuorvala's avatar Ville Nuorvala Committed by David S. Miller
Browse files

[IPV6]: Improve IPv6 tunnel error reporting 



Log an error if the remote tunnel endpoint is unable to handle
tunneled packets.

Signed-off-by: default avatarVille Nuorvala <vnuorval@tcs.hut.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6fb32dde

net/ipv6/ip6_tunnel.c

+7 −6
Original line number Diff line number Diff line
@@ -424,11 +424,8 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 
		}

		break;

	case ICMPV6_PARAMPROB:

		/* ignore if parameter problem not caused by a tunnel

		   encapsulation limit sub-option */

		if (code != ICMPV6_HDR_FIELD) {

			break;

		}

		teli = 0;

		if (code == ICMPV6_HDR_FIELD)

			teli = parse_tlv_tnl_enc_lim(skb, skb->data);



		if (teli && teli == ntohl(info) - 2) {
@@ -441,6 +438,10 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, 
					       "tunnel!\n", t->parms.name);

				rel_msg = 1;

			}

		} else if (net_ratelimit()) {

			printk(KERN_WARNING

			       "%s: Recipient unable to parse tunneled "

			       "packet!\n ", t->parms.name);

		}

		break;

	case ICMPV6_PKT_TOOBIG: