The internet-draft is hosted at draft-ietf-dtn-udpcl.
A local build of the current main branch is available draft-ietf-dtn-udpcl.html with its misspelling.txt. A difference from the datatracker draft and this local version can be viewed side-by-side.
Prerequisites to building can be installed on Ubuntu with:
sudo apt-get install -y cmake python3 python3-pip python3-setuptools python3-wheel ruby xmlstarlet aspell cargo
pip3 install xml2rfc
sudo gem install cbor-diag
sudo cargo install --root /usr/local cddl
Then the document can be built with
cmake -S . -B build/default
cmake --build build/default
The demo agent is in a separate project dtn-demo-agent.
The wireshark modules are in a separate project dtn-wireshark.