This makes µD3TN behave the same as v0.13.0 when executed without an
additional commandline argument. A new commandline argument `-d` /
`--external-dispatch` is added, which enables the use of external BDMs.
The default forwarding implementation is now again provided using the
v0.13 code, extracted from e1621765a4 and
adapted to the new agent-based forwarding implementation.
Central changes to the old code include:
- A new "Routing Agent" that handles incoming configuration commands,
FIB updates, and BDM dispatch requests.
- The use of the BDM authorization flag to authorize contact
configuration commands.
- The Contact Manager now only triggers the creation and removal of
links / FIB entries; bundle dispatch is triggered through the FIB and
BDM callback functions of the Routing Agent.
- The fragmentation logic is adapted to store the original bundle along
with an offset and length value, instead of pre-creating and storing
the fragments.
- The bundle re-scheduling logic integrated into the Routing Agent is
simplified and does not support changing the fragmentation parameters.
A new function is added to the Router that searches for a new route
for such fragments that were already scheduled at some point,
considering them as un-fragmentable bundle with overridden fragment
offset and length.
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
This adds the code from e1621765a4 back
into the tree unchanged, but moved into two new directories, in
preparation of the following commit, which adds a routing agent on this
basis, to make it possible to review the diff properly.
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
This adds functionality to dispatch bundles and control the FIB to AAP
2.0 and the bundle processor, replacing the old "router" completely.
AAP 2.0 is extended slightly to enable fragmentation.
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>
This changes the "from" and "to" fields in the contact struct to
milliseconds-based timestamps and adapts all dependent code. The contact
data format is kept second-based for backward compatibility.
The commit also introduces a new function to work with millisecond
timestamps in the remaining capacity calculation and modifies the tests
related to the latter such that they do not need to change the timestamp.
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
There was a rare memory leak if the contact was not found in the target
list (e.g., already deleted earlier).
Signed-off-by: Felix Walter <felix.walter@d3tn.com>
Previously we would simply ignore any contact that was overlapping. This
changes the routing table's behavior such that overlapping contacts with
the same node are merged and overlapping contacts with multiple
different nodes are just allowed and added alongside each other. The
maximum number of contacts defined by `MAX_CONCURRENT_CONTACTS` now is
just a limitation of the Contact Manager which will not process more
than that number of contacts at the same time. (If one of them ends, a
concurrent contact that was not handled can be added.)
This change requires, however, that overlapping contacts are properly
rejected in router commands. This is achieved by a corresponding update
of the add/update/delete functions and an extension of the preliminary
checks.
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>
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>
