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sctp: ASCONF-ACK with Unresolvable Address should be sent

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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.xin@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
lucien 2015-08-28 17:45:58 +08:00 committed by David S. Miller
parent 7084a31589
commit 7c5a946181
1 changed files with 13 additions and 2 deletions
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15
net/sctp/sm_make_chunk.c
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@ -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