On Sat, Jul 25, 2015 at 01:08:08PM +0800, Xin Long wrote:
> RFC 5061:
>     This is an opaque integer assigned by the sender to identify each
>     request parameter.  The receiver of the ASCONF Chunk will copy this
>     32-bit value into the ASCONF Response Correlation ID field of the
>     ASCONF-ACK response parameter.  The sender of the ASCONF can use this
>     same value in the ASCONF-ACK to find which request the response is
>     for.  Note that the receiver MUST NOT change this 32-bit value.
> 
>     Address Parameter: TLV
> 
>     This field contains an IPv4 or IPv6 address parameter, as described
>     in Section 3.3.2.1 of [RFC4960].
> 
> ASCONF chunk with Error Cause Indication Parameter (Unresolvable Address)
> should be sent if the Delete IP Address is not part of the association.
> 
>   Endpoint A                           Endpoint B
>   (ESTABLISHED)                        (ESTABLISHED)
> 
>   ASCONF        ----------------->
>   (Delete IP Address)
>                 <-----------------      ASCONF-ACK
>                                         (Unresolvable Address)
> 
> Signed-off-by: Xin Long <lucien....@gmail.com>
> ---
>  net/sctp/sm_make_chunk.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
> index 06320c8..6e399f6 100644
> --- a/net/sctp/sm_make_chunk.c
> +++ b/net/sctp/sm_make_chunk.c
> @@ -3090,8 +3090,19 @@ static __be16 sctp_process_asconf_param(struct 
> sctp_association *asoc,
>                       sctp_assoc_set_primary(asoc, asconf->transport);
>                       sctp_assoc_del_nonprimary_peers(asoc,
>                                                       asconf->transport);
> -             } else
> -                     sctp_assoc_del_peer(asoc, &addr);
> +                     return SCTP_ERROR_NO_ERROR;
> +             }
> +
> +             /* If the address is not part of the association, the
> +              * ASCONF-ACK with Error Cause Indication Parameter
> +              * which including cause of Unresolvable Address should
> +              * be sent.
> +              */
> +             peer = sctp_assoc_lookup_paddr(asoc, &addr);
> +             if (!peer)
> +                     return SCTP_ERROR_DNS_FAILED;
> +
> +             sctp_assoc_rm_peer(asoc, peer);
>               break;
>       case SCTP_PARAM_SET_PRIMARY:
>               /* ADDIP Section 4.2.4
> -- 
> 2.1.0
> 

Looks good to me.

  Marcelo

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