Previously the fragmentation logic was very specific to uD3TN's
forwarding approach, modifying the original bundle in the process. With
BDMs supporting fragmentation we must make this more flexible. Thus, we
now pass an offset and length and always create a copy of the required
contents based on the original bundle.
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
This adds a custom header that does explicitly not include the Unity
wrappers for malloc, free, etc. by defining the guard used by that header
file. This way we can remove the wrappers provided via the linker
altogether.
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
ud3tn is available under multiple licenses and we want to reflect this in
our source code. But which license information should appear first and how
can we manage this efficiently in the future? The Linux Kernel uses SPDX
expressions instead of boilerplate sections. This seems to be a great
approach, so we do the same here.
Signed-off-by: Georg Alexander Murzik <georg.murzik@d3tn.com>
1) There was an obvious issue with the code here: We want to check that
the bundle was NOT fragmented, thus, we have to negate the result of
bundle_is_fragmented.
2) We under-estimated the possible size of bundle fragments if they have a
fragment offset != 0 (the encoded fragment offset can occupy multiple
bytes in this case). This uses a conservative estimation for allowing
scheduling of the bundle such that contacts are never overbooked.
Fixes: #66
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
To be compatible with the latest version of BPv7, the internal
representation of DTN timestamps, for both uD3TN and the Python library,
is changed to milliseconds.
For compatibility reasons, a conversion to seconds is performed during
the de-/serialization of BPv6.
Furthermore, additional test cases are added and the creation_time_ms of
the test bundle is set to a non-trivial timestamp.
Also, the Python functions for converting POSIX timestamps to DTN
timestamps are removed, as there is now a distinction between BPv6 and
BPv7 DTN timestamps. The conversion is now done in the corresponding BP
implementations themselves.
Signed-off-by: Maximilian Nitsch <maximilian.nitsch@d3tn.com>
This is the initial commit for uD3TN. uD3TN is a fork of uPCN v0.8.0,
which will be developed and maintained in a public Git repository.
For questions concerning the history of and code provided with uPCN,
please get in touch with us via: contact <at> d3tn <dot> com
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
