Re: [tcpm] poll for adoption of draft-ananth-persist-02
Joe Touch <touch@ISI.EDU> Sat, 03 April 2010 18:01 UTC
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Date: Sat, 03 Apr 2010 10:59:42 -0700
From: Joe Touch <touch@ISI.EDU>
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Cc: "tcpm@ietf.org" <tcpm@ietf.org>, Murali Bashyam <MBashyam@ocarinanetworks.com>, mallman@icir.org
Subject: Re: [tcpm] poll for adoption of draft-ananth-persist-02
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John Heffner wrote: > On Thu, Apr 1, 2010 at 3:53 PM, Mark Allman <mallman@icir.org> wrote: >>> There are other aspects too, it's also important for the application >>> to control the duration that the connection spends in persist state, >>> this is planned to be accomplished via a socket option. >> Why? >> >> I mean, sure, an app may want to not let a connection hang around >> forever. But, can't it just ABORT whenever it wants? > > I suspect one reason this has become an issue is that the sockets > interface does not provide ABORT semantics, so it's not possible on > most operating systems to write an application that is able to avoid > tying up kernel memory. I'm not sure this is an IETF issue, though. I don't think so either. RFC 793 specifies an API (including ABORT), but not how it is instantiated. It looks like this is already possible, though: Linux has abort via: CLOSE after SO_LINGER(l_onoff=nonzero, l_linger=0) FreeBSD has a sysctl_drop accessible by TCPCTL_DROP There appears to be a userland command for this called tcpdrop, too. Joe
- [tcpm] poll for adoption of draft-ananth-persist-… Eddy, Wesley M. (GRC-MS00)[ASRC AEROSPACE CORP]
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mark Allman
- Re: [tcpm] poll for adoption of draft-ananth-pers… Murali Bashyam
- Re: [tcpm] poll for adoption of draft-ananth-pers… Joe Touch
- Re: [tcpm] poll for adoption of draft-ananth-pers… John Heffner
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mahesh Jethanandani
- Re: [tcpm] poll for adoption of draft-ananth-pers… Joe Touch
- Re: [tcpm] poll for adoption of draft-ananth-pers… Anantha Ramaiah (ananth)
- Re: [tcpm] poll for adoption of draft-ananth-pers… John Heffner
- Re: [tcpm] poll for adoption of draft-ananth-pers… Murali Bashyam
- Re: [tcpm] poll for adoption of draft-ananth-pers… Joe Touch
- Re: [tcpm] poll for adoption of draft-ananth-pers… Murali Bashyam
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mahesh Jethanandani
- Re: [tcpm] poll for adoption of draft-ananth-pers… John Heffner
- Re: [tcpm] poll for adoption of draft-ananth-pers… Murali Bashyam
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mark Allman
- Re: [tcpm] poll for adoption of draft-ananth-pers… John Heffner
- Re: [tcpm] poll for adoption of draft-ananth-pers… Anantha Ramaiah (ananth)
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mark Allman
- Re: [tcpm] poll for adoption of draft-ananth-pers… Murali Bashyam
- Re: [tcpm] poll for adoption of draft-ananth-pers… Joe Touch
- Re: [tcpm] poll for adoption of draft-ananth-pers… Fernando Gont
- Re: [tcpm] poll for adoption of draft-ananth-pers… Mark Allman
- Re: [tcpm] poll for adoption of draft-ananth-pers… Fernando Gont
- Re: [tcpm] poll for adoption of draft-ananth-pers… Eddy, Wesley M. (GRC-MS00)[ASRC AEROSPACE CORP]
- Re: [tcpm] poll for adoption of draft-ananth-pers… Christos Zoulas
- Re: [tcpm] poll for adoption of draft-ananth-pers… Anantha Ramaiah (ananth)
- Re: [tcpm] poll for adoption of draft-ananth-pers… Eddy, Wesley M. (GRC-MS00)[ASRC AEROSPACE CORP]