netdev - Re: [Lksctp-developers] [PATCH 1/2] sctp: do not enable peer features if we can't do them.

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Date:	Thu, 18 Sep 2008 19:01:23 -0400
From:	Vlad Yasevich <vladislav.yasevich@...com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
	lksctp-developers@...ts.sourceforge.net
Subject: Re: [Lksctp-developers] [PATCH 1/2] sctp: do not enable peer features
 if we can't do them.

David

Can you also queue this one and Patch 2/2 to stable.  The problems
are there as well.

Thanks
-vlad

Vlad Yasevich wrote:
> Do not enable peer features like addip and auth, if they
> are administratively disabled localy.  If the peer resports
> that he supports something that we don't, neither end can
> use it so enabling it is pointless.  This solves a problem
> when talking to a peer that has auth and addip enabled while
> we do not.  Found by Andrei Pelinescu-Onciul <andrei@...el.org>.
> 
> Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>
> ---
>  net/sctp/sm_make_chunk.c |    9 +++++++--
>  1 files changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
> index e8ca4e5..fe94f42 100644
> --- a/net/sctp/sm_make_chunk.c
> +++ b/net/sctp/sm_make_chunk.c
> @@ -1886,11 +1886,13 @@ static void sctp_process_ext_param(struct sctp_association *asoc,
>  			    /* if the peer reports AUTH, assume that he
>  			     * supports AUTH.
>  			     */
> -			    asoc->peer.auth_capable = 1;
> +			    if (sctp_auth_enable)
> +				    asoc->peer.auth_capable = 1;
>  			    break;
>  		    case SCTP_CID_ASCONF:
>  		    case SCTP_CID_ASCONF_ACK:
> -			    asoc->peer.asconf_capable = 1;
> +			    if (sctp_addip_enable)
> +				    asoc->peer.asconf_capable = 1;
>  			    break;
>  		    default:
>  			    break;
> @@ -2460,6 +2462,9 @@ do_addr_param:
>  		break;
>  
>  	case SCTP_PARAM_SET_PRIMARY:
> +		if (!sctp_addip_enable)
> +			goto fall_through;
> +
>  		addr_param = param.v + sizeof(sctp_addip_param_t);
>  
>  		af = sctp_get_af_specific(param_type2af(param.p->type));

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