From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ashok Kumar Date: Tue, 12 Dec 2017 16:51:41 +0000 Subject: How to restrict SCTP abort during a process crash Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sctp@vger.kernel.org Hi, We are using LKSCTP in our LTE product (HeNBGW). We have high-availability support also in our product. In case of any failure on active VM, standby VM will take over active role and all the SCTP associations will be moved to that new active VM. The associations should be moved transparent to the peers (a kind of SCTP reset before SCTP heartbeat expires on the peer nodes). But the problem that we face is that when a process crashes on active VM, the LKSCTP stack immediately sends SCTP abort to the peers for all associations before the system goes down completely. This creates confusion with the peers. Is there any way to avoid sending SCTP abort message in this scenario? If yes, please let us know how to do the same? If it needs LKSCTP kernel code change, please give pointers on what and where to change. P.S: We tried to block the abort messages by dynamically using IPtables through signal handler (for signal 11 and 6). But this did not work. A quick response will be highly appreciated. Thanks, Ashok