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NSIS based NetServ Signalling Protocol

NSIS based NetServ Signalling Protocol. Design and Implementation Roberto Francescangeli Visiting PhD student. NetServ Signaling Protocol. On- Path NSIS based protocol NetServ protocol runs on top of GIST in C-mode NetServ protocol will provide Request validation and authentication

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NSIS based NetServ Signalling Protocol

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  1. NSIS basedNetServSignallingProtocol Design and Implementation Roberto Francescangeli VisitingPhDstudent

  2. NetServSignalingProtocol • On-Path NSIS basedprotocol • NetServprotocolruns on top of GIST in C-mode • NetServprotocolwillprovide • Requestvalidation and authentication • Installation and removal of service modules on path • NetServ network probingfeaturessuchas • State of on-pathnodes (TopologyDiscovery) • State of services (Service Discovery) • Logs and errorscollection for service/node management system or debug

  3. Design of NetServProtocol 1 • 3 Requestmessages • SETUP • REMOVE • PROBE • 3 Responsemessages, one for eachrequest • Messagescarry TLV encoded data (GIST-like format) • Probe Responsecontains a stack of responses • Eachnodetraversed by the probe addsitsown data • Initiatingnodewillget the stack and processit • Data can be used by othernodes on the pathaswell • Authorization for Probe Requests (TBD)

  4. Design of NetServProtocol 2 • Only NSIS nodes with a runningNetServ NSLP willprocess the protocolmessages • Othernodesforward the packetstransparently

  5. Message and TLV Objects 1 • SETUP Request • Data ID • URLs • Lifetime • [Security, NodeIDs, ConditionalInstall, Additional Info] • REMOVE Request • Data ID • [Security, NodeIDs, ConditionalInstall, Additional Info] • PROBE Request • Data ID • Probe Ids • Security

  6. Message and TLV Objects 2 • SETUP and REMOVE Response • Response (class, code, object of interest) • [Additional Information] • PROBE Response • Node ID • Data ID • Probe Data Each NODE additsownresponse to the messagecreating a stack

  7. GIST and NetServProtocol • NetServProtocolruns on top of GIST • GIST provides hop by hop nodediscovery, peerassociation and messagetransport

  8. ProtocolImplementation • Basedcompletely on Open Source technologies • 2 free GIST layerimplemetationsavailable: • FreeNSIS by University of Göttingen • NSIS-KA by University of Karlsruhe • C++ based • Multi-process or Multi-thread • Timer and Hashtableslibraries • Common API between GIST and NSLP makes the two GIST implementationsswappable

  9. Current Architecture

  10. ImplementationDetails • Services can trigger NetServsignalingusing a command line tool or a C++ Shared Library (.so) thatwillconnectdirectly to the NSLP daemon • GIST daemonalwaysconnected to NSLP daemon • NSLP daemonalwaysconnected to NetServ controller • NetServ controller will validate and executerequests • Download, verification, installation of services • Service Container management • NetServKernel management • Virtualization of different Service Containers management

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