* Reduced MS/TP MAX_APDU to 480 from 1476 so that devices not use new MS/TP extended frame types which older routers do not understand.
* Added extra objects to STM32F4xx example to elicit edge cases in object-list for testing.
* Changed MS/TP master node self destination checks to be located in receive FSM
* Changed MSTP zero configuration: modified comments for state transition names; modified next station increment; refactored the UUID rand() to not be required by common zero config implementation; added more unit tests.
* Added another context to MS/TP user data to allow additional user data
* Added dependent BACnet stack headers into bacdef.h file.
* Changed bacdef.h and other stack includes in c/h files to have a common pattern.
* Moved bits.h, bytes.h, and bacnet_stack_exports.h under bacnet/basic/sys/ folder.
* Fix routing to a remote network in the router-mstp example.
The net, len and adr fields of remote_dest are not initialized
although they are used by the npdu_encode_pdu function in
case of "Routing to another Router". Thank you, Eugene!
* Fixed handling of received MS/TP extended frames.
mstp_port->DataLength should be set to the actual length of decoded data.
* Fix MSTP_Master_Node_FSM and MSTP_Slave_Node_FSM for extended frames.
BACNET_EXTENDED_DATA frames should be treated the same as
their corresponding BACNET_DATA frames.
* Fixed MSTP COBS frame encoding
cobs_frame_encode writes the encoded data to the
beginning of the buffer, overwriting the frame header.
The frame header is constructed before COBS frame encoding,
so it contains the wrong Frame Type and Data Length.
* Added extended frame client unit test
* Fix router-ipv6 application for remote networks
* Added a MS/TP zero-config (automatically choose an unused MAC address) using an algorithm that starts with MAC=64 and waits for a random number of PFM (minimum of 8 plus modulo 64) before attempting to choose a MAC sequentially from 64..127. The confirmation uses a 128-bit UUID with the MSTP Test Request frame. The modifications are in src/bacnet/datalink/mstp.c and src/bacnet/datalink/dlmstp.c modules enabling any device to use zero-config if enabled. A working demonstration is in the ports/stm32f4xx for the NUCLEO board. Complete unit testing is included. Options include lurking forever (wait for a router or another master node before joining) or lurking for a minimum time (enables self forming automatic MAC addressing device nodes).
Steve Karg