1. DTN Reference Implementation Update
Michael Demmer
IETF 71 ~ Philadelphia, PA
March 12, 2008

2. Status: Protocols Implemented Specifications:
Bundle Protocol (RFC 5050)
Bundle Security Protocol (ID)
TCP Convergence Layer (ID)
Metadata Block (ID)

3. Status: Protocols (2) BP-related IDs not implemented:
Bundle Encapsulation
Previous Hop Block
Retransmission Block
Checksum Ciphersuites

4. * Not currently maintained
Status: Routing
Delay-Tolerant Link State Routing (DTLSR)
Prophet
Static tables
Simple flooding
External Router support
Tetherless Computing Architecture (TCA)*
* Not currently maintained

5. Status: Platforms Supported Operating Systems:
Linux (x86, 64-bit x86, ARM)
Mac OS X (x86, PPC)
Unsupported (but probably works):
FreeBSD (x86), Solaris (x86)
Cygwin does not work

6. Recent Changes Latest release: 2.5.0 (October 2007)
SPARTA’s Bundle Security Protocol implementation
SWIG bindings for application interface (Tcl, Python, Perl)
Miscellaneous: API poll, route to EID

7. Recent Changes (2) Source Control switch to Mercurial
BBN fixes for duplicate bundles, shutdown races, memory leaks, etc.
Support for Mac OS X 10.5 (Leopard)
Rework of core forwarding path

8. Ongoing Work Publish/Subscribe API HotNets 2007 paper
Session layer protocol and implementation:
Multicast and pull-based unicast capability
New session block for update bundles
Join/leave messages routed to dtn-session:<group_eid>

9. Ongoing Work (2) Apache Portable Runtime
Platform abstractions for OS features
Aids future port to Win32
Rework of storage layer
Payload data cache to limit disk thrashing
Improve efficiency under load

10. Releases and Roadmap Minor 2.5.1 release within the month
2.6.0 release targeting this summer
Session layer, pub/sub interface, APR port, storage/scalability improvements
My graduation target summer / early fall
Future of the RI discussion this evening