From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xin Long Subject: [RFC PATCH net] sctp: ASCONF-ACK with Unresolvable Address should be sent Date: Fri, 24 Jul 2015 14:56:29 +0800 Message-ID: <1437720989-6610-1-git-send-email-lucien.xin@gmail.com> Cc: mleitner@redhat.com To: network dev Return-path: Received: from mail-pa0-f41.google.com ([209.85.220.41]:33054 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753017AbbGXG4d (ORCPT ); Fri, 24 Jul 2015 02:56:33 -0400 Received: by padck2 with SMTP id ck2so9594181pad.0 for ; Thu, 23 Jul 2015 23:56:32 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: 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 --- net/sctp/sm_make_chunk.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index 06320c8..88d82ef 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -3090,8 +3090,18 @@ 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 + } else { + /* 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_del_peer(asoc, &addr); + } break; case SCTP_PARAM_SET_PRIMARY: /* ADDIP Section 4.2.4 -- 2.1.0