Rust implementation of dtn Bundle Protocol Version 7 (RFC 9171)
This library only handles encoding and decoding of bundles, not transmission or other processing of the data. A full daemon using this library can be found here: https://github.com/dtn7/dtn7-rs
Through the provided FFI interface, this library can also be used from C/C++, nodejs or flutter.
A simple benchmark is shipped with the library. It (de)serializes Bundles with a primary block, bundle age block and a payload block with the contents (b"ABC"). This benchmark can be used to compare the rust implementation to the golang, python or java implementations.
cargo run --release --example benchmark
Finished release [optimized] target(s) in 0.29s
Running `target/release/examples/benchmark`
Creating 100000 bundles with CRC_NO: 510059 bundles/second
Creating 100000 bundles with CRC_16: 293399 bundles/second
Creating 100000 bundles with CRC_32: 291399 bundles/second
Encoding 100000 bundles with CRC_NO: 1090996 bundles/second
Encoding 100000 bundles with CRC_16: 436836 bundles/second
Encoding 100000 bundles with CRC_32: 432774 bundles/second
Loading 100000 bundles with CRC_NO: 564817 bundles/second
Loading 100000 bundles with CRC_16: 473768 bundles/second
Loading 100000 bundles with CRC_32: 462013 bundles/second
These numbers were generated on a MBP 13" 2018 with i5 CPU and 16GB of ram.
For debugging a small helper tool is shipped providing basic functionality such as: - random bundle generation (as hex and raw bytes) - encoding of standard bundles (as hex and raw bytes) - decoding of bundles (from hex and raw bytes) - exporting raw payload of decoded bundles - time conversion helpers
Some examples are given in the following shell session:
```
$ cargo install bp7
[...]
$ bp7
usage "bp7"
$ bp7 decode 9f88071a000200040082016e2f2f6e6f646531382f7e74656c6582016e2f2f6e6f646538312f66696c657382016e2f2f6e6f646538312f66696c6573821b0000009e8d0de538001a0036ee80850a020000448218200085010100004443414243ff
[src/main.rs:101] &bndl = Bundle { primary: PrimaryBlock { version: 7, bundlecontrolflags: 131076, crc: CrcNo, destination: Dtn( 1, DtnAddress( "//node18/~tele", ), ), source: Dtn( 1, DtnAddress( "//node81/files", ), ), reportto: Dtn( 1, DtnAddress( "//node81/files", ), ), creationtimestamp: CreationTimestamp( 680971330872, 0, ), lifetime: 3600s, fragmentationoffset: 0, totaldatalength: 0, }, canonicals: [ CanonicalBlock { blocktype: 10, blocknumber: 2, blockcontrolflags: 0, crc: CrcNo, data: HopCount( 32, 0, ), }, CanonicalBlock { blocktype: 1, blocknumber: 1, blockcontrol_flags: 0, crc: CrcNo, data: Data( [ 65, 66, 67, ], ), }, ], }
$ echo -e "source=dtn://node1/bla\ndestination=dtn://node2/incoming\nlifetime=1h" > /tmp/out.manifest $ echo "hallo welt" | bp7 encode /tmp/out.manifest - -x 9f880700008201702f2f6e6f6465322f696e636f6d696e6782016b2f2f6e6f6465312f626c61820100821b0000009e8d137d23001a0036ee8085010100004c4b68616c6c6f2077656c740aff
$ bp7 decode 9f880700008201702f2f6e6f6465322f696e636f6d696e6782016b2f2f6e6f6465312f626c61820100821b0000009e8d137d23001a0036ee8085010100004c4b68616c6c6f2077656c740aff -p hallo welt
```
The generated hex string can also be directly discplayed as raw cbor on the awesome cbor.me website, e.g. http://cbor.me/?bytes=9f88071a000200040082016e2f2f6e6f646531382f7e74656c6582016e2f2f6e6f646538312f66696c657382016e2f2f6e6f646538312f66696c6573821b0000009e8d0de538001a0036ee80850a020000448218200085010100004443414243ff
This library only handles encoding and decoding of bundles, not transmission or other processing of the data.
The library can be used as a shared library or statically linked into other apps.
With the help of cbindgen (cargo install cbindgen) the header file for this crate can be generated:
$ cbindgen -c cbindgen.toml > target/bp7.h
Example usages for Linux with C calling bp7 as well as nodejs can be found in examples/ffi.
The library should build for wasm even though only very few functions get exported. The example benchmark can also be used in the browser through the cargo-web crate:
cargo web start --target wasm32-unknown-unknown --example benchmark --release
Results should be shown in the javascript console on http://127.0.0.1:8000.
The performance is quite similar to the native performance:
Creating 100000 bundles with CRC_NO: 441696 bundles/second
Creating 100000 bundles with CRC_16: 416484 bundles/second
Creating 100000 bundles with CRC_32: 405022 bundles/second
Encoding 100000 bundles with CRC_NO: 1647039 bundles/second
Encoding 100000 bundles with CRC_16: 908059 bundles/second
Encoding 100000 bundles with CRC_32: 867603 bundles/second
Loading 100000 bundles with CRC_NO: 401727 bundles/second
Loading 100000 bundles with CRC_16: 388394 bundles/second
Loading 100000 bundles with CRC_32: 384186 bundles/second
Some functions can easily be used from javascript (cargo web deploy --release):
javascript
Rust.bp7.then(function(bp7) {
var b = bp7.rnd_bundle_now();
var enc = bp7.encode_to_cbor(b);
var payload = bp7.payload_from_bundle(b)
console.log(payload);
console.log(String.fromCharCode.apply(null, payload));
console.log(bp7.cbor_is_administrative_record(enc));
console.log(bp7.sender_from_cbor(enc));
console.log(bp7.recipient_from_bundle(b));
console.log(bp7.valid_bundle(b));
});
Note that at the moment all functions have a variant working on the binary bundle and one working on the decoded bundle struct.
If you use this software in a scientific publication, please cite the following paper:
BibTeX
@INPROCEEDINGS{baumgaertner2019bdtn7,
author={L. {Baumgärtner} and J. {Höchst} and T. {Meuser}},
booktitle={2019 International Conference on Information and Communication Technologies for Disaster Management (ICT-DM)},
title={B-DTN7: Browser-based Disruption-tolerant Networking via Bundle Protocol 7},
year={2019},
volume={},
number={},
pages={1-8},
keywords={Protocols;Browsers;Software;Convergence;Servers;Synchronization;Wireless fidelity},
doi={10.1109/ICT-DM47966.2019.9032944},
ISSN={2469-8822},
month={Dec},
}
Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in bp7-rs by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.