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[IPV6]: Improve IPv6 tunnel error reporting 

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

Signed-off-by: Ville Nuorvala <vnuorval@tcs.hut.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ville Nuorvala 2006-11-24 17:08:58 -08:00 committed by David S. Miller
parent 6fb32ddeb2
commit 107a5fe619
1 changed files with 7 additions and 6 deletions
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13
net/ipv6/ip6_tunnel.c
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@ -424,12 +424,9 @@ 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 = parse_tlv_tnl_enc_lim(skb, skb->data);
teli = 0;
if (code == ICMPV6_HDR_FIELD)
teli = parse_tlv_tnl_enc_lim(skb, skb->data);
if (teli && teli == ntohl(info) - 2) {
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
@ -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: