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DTN Reference Implementation Update

DTN Reference Implementation Update. Michael Demmer IETF 65 – Dallas, TX March 23, 2006. Outline. Status Deployments Future Directions. Implementation Status. 55,431 Source Lines of code (reported by David Wheeler’s SLOCcount) Up to date with the Bundle Spec v4

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DTN Reference Implementation Update

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  1. DTN Reference Implementation Update Michael Demmer IETF 65 – Dallas, TX March 23, 2006

  2. Outline • Status • Deployments • Future Directions

  3. Implementation Status • 55,431 Source Lines of code • (reported by David Wheeler’s SLOCcount) • Up to date with the Bundle Spec v4 • Tested on Linux (x86 and ARM), Mac OS X (PPC), Windows / Cygwin • Active development / user community • 100 subscribers to dtn-users mailing list

  4. 2.2.0 Release (coming soon) • Updates to match the bundle spec, including the dtn: scheme, SDNV implemenation, status reports, bundle format changes, etc. • Custody Transfer implementation • File based storage system • TCA implementation from Waterloo • Initial Bluetooth convergence layer support • Minor updates, stability improvements, scalability, bug fixes, etc

  5. DTN/TierStore in Cambodia • TIER (Technology and Infrastructure for Emerging Regions) project • Partner with Asia Foundation funded Cambodian Information Centers • Distributed storage system (TierStore) • Filesystem-like storage replicated over DTN • Disconnected web cache (wwwoffle) • Plans to extend to email

  6. DTN based data collection • TIER summer projects • Survey collection in Rwanda • Fair trade coffee tracking in Brazil • System architecture: • Cell phone for data input • DTN transport when connectivity is available (or via sneakernet) • Database backend in data center

  7. Future Directions • Input Links / Last Hop header • Identify where a bundle came from • Bidirectional TCP Convergence Layer • Better support for opportunistic contacts, NAT busting, more efficient bundle flow • Abstract code for any connection-oriented transport (e.g. Bluetooth, SCTP) • Integrate security implementation • File based convergence layer

  8. Future Directions (2) • Enhanced route matching hooks • Select route based on input link, priority of bundle, source eid, etc • Policy hooks for routing (Waterloo?) • Prophet implementation (Jeff Wilson?)

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