A broadcast from a device with its own port went to that port, whose
layers drop it, so a broadcast port could not reach reliable peers. It now
goes to the broadcast port when there is one.
Fragmentation allocates its buffers with RAMAllocator and fails setup when
they cannot be allocated. A fragment from another source no longer drops
the packet being joined.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
AddressingPort derives max_packet_size from the link in its constructor,
and the fragmentation layer passes its configured size to the base
constructor.
Co-Authored-By: Claude Code <noreply@anthropic.com>
As in the other layers, addressing ports and fragmentation get no room
when max_packet_size is smaller than their header, and fragmentation
fails its setup instead of dividing by zero.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The addressing layer lets several devices share a channel such as an
RS485 bus or a radio, with 16-bit addresses. A link can carry several
peers, each with its own stack of layers and its own id. Layers that work
between two devices only are rejected with broadcast addressing. The
fragmentation layer splits packets larger than the layers below allow,
and joins them again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
