From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Wed, 29 Apr 2009 12:28:34 +0000
Subject: Re: Regarding SCTP_DELAYED_ACK_TIME
Message-Id: <49F847F2.8060802@hp.com>
List-Id: <linux-sctp.vger.kernel.org>
References: <816fa6970904290514q347cdc9am2b25c123a94af605@mail.gmail.com>
In-Reply-To: <816fa6970904290514q347cdc9am2b25c123a94af605@mail.gmail.com>
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To: linux-sctp@vger.kernel.org

Padmalochan Moharana wrote:
> Hello,
> 
> In my application I have tried to set the SACK timer to 400 Milli
> second by writing following code.
> 
> struct sctp_assoc_value sack_timer ;
> bzero(&sack_timer, sizeof(sack_timer));
> sack_timer.assoc_id =1 ;
> sack_timer.assoc_value = 400 ;
> int res = setsockopt(socketFD, IPPROTO_SCTP, SCTP_DELAYED_ACK_TIME,
> &sack_timer,sizeof(struct sctp_assoc_value ));
> 
> But setsockopt() returns error ("Protocol not available").
> 
> The kernel version i have used is : 2.6.9-55.EL
> lksctp version: 1.0.8

This kernel does not support the socket option you are trying to use.
You need to upgrade the kernel.

-vlad

> 
> Please let me know how can i set SCTP_DELAYED_ACK_TIME value in my application.
> 
> Br,
> Padmalochan
>