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John Buford, Mario Kolberg 3/29/2011

Application Layer Multicast Extensions to RELOAD draft-kolberg-sam-baseline-protocol-00 ALM Usage for RELOAD. John Buford, Mario Kolberg 3/29/2011. Overview. Baseline document Extension to RELOAD, uses P2PSIP RELOAD as the overlay layer Split document:

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John Buford, Mario Kolberg 3/29/2011

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  1. Application Layer Multicast Extensions to RELOADdraft-kolberg-sam-baseline-protocol-00ALM Usage for RELOAD John Buford, Mario Kolberg 3/29/2011

  2. Overview • Baseline document • Extension to RELOAD, uses P2PSIP RELOAD as the overlay layer • Split document: • This document concentrates on ALM only RELOAD Usage • Another document soon on Hybrid ALM RELOAD Usage • Initial focus for ALM only is using a Scribe like algorithm for ALM, more algorithms later • Any comments welcome!

  3. P2P-SIP Architecture • Usage Layer • Set of application data types • Message Transport • Handles end-to-end reliability and request state for usages • Topology Plug-in • Implements specific overlay algorithm • Forwarding & Link Mgmt • Forwarding packets between nodes XMPP Usage SIP Usage … Messaging Service Boundary Message Transport Storage Topology Plug-in Forwarding & Link Mgmt Overlay Link Service Boundary TLS DTLS

  4. P2P-SIP Architecture Internet Model Correspondence to Overlay RELOAD Real Internet XMPP Usage SIP Usage Application … Message Transport Transport Storage Topology Plug-in (Routing) Forwarding & Link Mgmt Network Application Transport Link TLS DTLS Network Link

  5. ALM Usage for RELOAD • Usage Layer • Set of application data types • Message Transport • Handles end-to-end reliability and request state for usages • Topology Plug-in • Implements specific overlay algorithm • Forwarding & Link Mgmt • Forwarding packets between nodes XMPP Usage ALM Usage SIP Usage … Messaging Service Boundary Message Transport Storage Topology Plug-in Forwarding & Link Mgmt Overlay Link Service Boundary TLS DTLS

  6. ALM Usage for RELOAD Group API ALM Usage Algorithm Plug-in ALM Messages Message Transport Storage Topology Plug-in Forwarding & Link Mgmt TLS DTLS

  7. Scribe Application create(credentials, topicID) subscribe(credentials, topicID, eventHandler) unsubscribe(credentials, topicID) publish(credentials, topicID, event) invokeEventHandler(topicID, msg) forwardHandler(msg) subscribeHandler(msg) faultHandler(msg) SCRIBE route(msg, key) send(msg, IPaddr) deliver(msg, key) forward(msg, key, nextId) RELOAD

  8. Message Mapping

  9. Scribe Pseudocode CREATE : groups.add(msg.GroupId) MULTICAST : foreach(groups[msg.GroupId].children as NodeId) SEND(msg,NodeId) if memberOf(msg.GroupId) invokeMessageHandler(msg.GroupId, msg) LEAVE : groups[msg.GroupId].children.remove(msg.source) if (groups[msg.group].children = 0) SEND(msg,groups[msg.GroupId].parent)

  10. Scribe Pseudocode cont. JOIN : if(checkAccept(msg)) { recvJoins.add(msg.source, msgGroupId) SEND(JOINAccept(nodeID, msg.source, msg.GroupId)) } JOINDecline: if(recvJoins.contains(msg.source,msg.GroupId)) recvJoins.del(msg.source, msgGroupId) JOINConfirm: if(recvJoins.contains(msg.source,msg.GroupId)){ if !(groups.contains(msg.GroupId)) { groups.add(msg.GroupId) SEND(msg,msg.GroupId) } groups[msg.GroupId].children.add(msg.source) recvJoins.del(msg.source, msgGroupId) }

  11. Next Steps • Update draft on ALM Usage for RELOAD • Start working on the Hybrid ALM Usage for RELOAD

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