netdev - Re: [PATCH 09/11] sctp: move route updating for redirect to ndisc layer

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Date:	Thu, 12 Sep 2013 14:33:32 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Duan Jiong <duanj.fnst@...fujitsu.com>
CC:	davem@...emloft.net, netdev@...r.kernel.org,
	hannes@...essinduktion.org,
	"linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>
Subject: Re: [PATCH 09/11] sctp: move route updating for redirect to ndisc
 layer

(Please also cc linux-sctp on this one.)

On 09/12/2013 12:51 PM, Duan Jiong wrote:
> From: Duan Jiong <duanj.fnst@...fujitsu.com>
> 
> In additon, when dealing with redirect message, it should
> not report error message to user, and need to return
> directly.
> 
> Signed-off-by: Duan Jiong <duanj.fnst@...fujitsu.com>
> ---
>   net/sctp/input.c | 12 ------------
>   net/sctp/ipv6.c  |  6 +++---
>   2 files changed, 3 insertions(+), 15 deletions(-)
> 
> diff --git a/net/sctp/input.c b/net/sctp/input.c
> index 5f20686..0d2d4b7 100644
> --- a/net/sctp/input.c
> +++ b/net/sctp/input.c
> @@ -413,18 +413,6 @@ void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
>   	sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
>   }
>   
> -void sctp_icmp_redirect(struct sock *sk, struct sctp_transport *t,
> -			struct sk_buff *skb)
> -{
> -	struct dst_entry *dst;
> -
> -	if (!t)
> -		return;
> -	dst = sctp_transport_dst_check(t);
> -	if (dst)
> -		dst->ops->redirect(dst, sk, skb);
> -}
> -
>   /*
>    * SCTP Implementer's Guide, 2.37 ICMP handling procedures
>    *
> diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
> index da613ce..ee12d87 100644
> --- a/net/sctp/ipv6.c
> +++ b/net/sctp/ipv6.c
> @@ -151,6 +151,9 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
>   	int err;
>   	struct net *net = dev_net(skb->dev);
>   
> +	if (type == NDISC_REDIRECT)
> +		return;
> +
>   	idev = in6_dev_get(skb->dev);
>   
>   	/* Fix up skb to look at the embedded net header. */
> @@ -181,9 +184,6 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
>   			goto out_unlock;
>   		}
>   		break;
> -	case NDISC_REDIRECT:
> -		sctp_icmp_redirect(sk, transport, skb);
> -		break;
>   	default:
>   		break;
>   	}
> 
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