Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: Anima bootstrap: discover protocol multicast notes)
peter van der Stok <stokcons@xs4all.nl> Thu, 16 February 2017 08:49 UTC
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Date: Thu, 16 Feb 2017 09:49:42 +0100
From: peter van der Stok <stokcons@xs4all.nl>
To: Michael Richardson <mcr+ietf@sandelman.ca>
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Cc: anima-bootstrap@ietf.org, Toerless Eckert <tte@cs.fau.de>, consultancy@vanderstok.org
Subject: Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: Anima bootstrap: discover protocol multicast notes)
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> > > <pvds> The beginning of section 8 says: " Whenever a Multicast > DNS > > responder starts up, wakes up from sleep, receives an indication > of a > > network interface "Link Change" event, or has any other reason to > > believe that its network connectivity may have changed in some > > relevant way, it MUST perform the two startup steps below: > Probing > > (Section 8.1) and Announcing (Section 8.3). " Much of the text > of > > Yes, that's the case on the first interval. Once it's none that, it's > not > supposed to be proactively announce itself again, from what I > understand. > It's a service, so it doesn't to defend it's name. > > > rfc6762 is about suppressing superfluous traffic. The method > relies > > on repetitive querying and reactive responding, with a response > at > > responder re-activation (see above). There is a lot of > operational > > experience here, and deserves attention. </pvds> > > Okay, but would this be a valid implementation: > unsigned char stuff[]={ 0x01,0x02, /* encoded DNS-SD reply */ > while(true) { > sleep(60); > sendmsg(stuff, multicast-address, port-5353); > } > This looks like a caricature of the mDNS text regarding the sleep. I don't think the text is intended for lots of sleepy sensors. From an inter-operability point of view it looks OK. One can argue about the load generated on the network. > ? > > >> It might be that in the end we don't care about the anonimity of > the > >> pledge. > > > <pvds> Did we? IMO, almost impossible in an unsecured > bootstrapping > > network. Once keys are distributed, pledge looses it identity > and > > starts afresh (I reckoned) </pvds> > > Okay, *DO YOU* care about anonimity of the pledge? > Do *YOU* care if the pledge must solicit a Join Proxy by multicasting a > query? *I* don't. preferably link-local though. > > >> If the pledge can ask the network about Join Proxy, then there > is > >> nothing to stop us from using mDNS here. > > > <pvds> Or anything else dependent on the operational environment > of > > the SDO using the bootstrapping protocol. </pvds> > > Agreed. > What would you like to chose here? Tell us your opinion. personally I would use CoAP discovery; we talk about CoAP here. And specify a join-proxy resource-type in the coap registry. > Don't be shy. Try to be bold. > > -- > Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works > -= IPv6 IoT consulting =-
- [Anima-bootstrap] Anima bootstrap: discover proto… Toerless Eckert
- Re: [Anima-bootstrap] Anima bootstrap: discover p… Toerless Eckert
- Re: [Anima-bootstrap] Anima bootstrap: discover p… Brian E Carpenter
- Re: [Anima-bootstrap] Anima bootstrap: discover p… Michael Richardson
- Re: [Anima-bootstrap] Anima bootstrap: discover p… Michael Richardson
- Re: [Anima-bootstrap] Anima bootstrap: discover p… Brian E Carpenter
- Re: [Anima-bootstrap] Anima bootstrap: discover p… peter van der Stok
- [Anima-bootstrap] M_FLOOD and mDNS (was Re: Anima… Michael Richardson
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Brian E Carpenter
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Michael Richardson
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… peter van der Stok
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Michael Richardson
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Brian E Carpenter
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… peter van der Stok
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… peter van der Stok
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Michael Richardson
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… peter van der Stok
- Re: [Anima-bootstrap] M_FLOOD and mDNS (was Re: A… Michael Richardson