Add netascii support

[msoulier]

Currently we only support octet mode. While mail support is likely pointless, netascii could be helpful for transferring text files, although I doubt it. It's likely just worth doing to be a more complete implementation.

[msoulier]

Scheduling for 1.0.

[EraYaN]

This is especially helpful for use with network gear with this library.

For example (older) HP ProCurve Switches use netascii.

Although when I remove the check where the octet only error is raised, it seems to work.

Log below: (Maybe there was something I missed, but it all seems okay, although the listen method refuses to stop looping after the transfer.)

Spawing TFTP server (push)...
DEBUG:tftpy:tftproot F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig does exist
DEBUG:tftpy:tftproot F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig is a directory
DEBUG:tftpy:tftproot F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig is readable
DEBUG:tftpy:tftproot F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig is writable
Connecting (netmiko)...
SSH connection established to 192.168.178.3:22
Interactive SSH session established
Connected!
Getting switch time...
Mon Aug 15 01:44:30 2016
Entered config mode.
Enabling tftp client switch side...
Output:
Output:
Downloading config and reloading switch...
Output: Device may be rebooted, do you want to continue [y/n]?
Output:
INFO:tftpy:Server requested on ip 0.0.0.0, port 69
INFO:tftpy:Starting receive loop...
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]
DEBUG:tftpy:Data ready on our main socket
DEBUG:tftpy:Read 26 bytes
DEBUG:tftpy:Creating new server context for session key = 192.168.178.3:1025
DEBUG:tftpy:In TftpContextServer.start
DEBUG:tftpy:Set metrics.start_time to 1471218357.55
DEBUG:tftpy:parsing a 26 byte packet
DEBUG:tftpy:opcode is 1
DEBUG:tftpy:in TftpPacketWithOptions.setoptions
DEBUG:tftpy:options: {}
DEBUG:tftpy:setting options hash to: {}
DEBUG:tftpy:in decode: about to iterate buffer counting nulls
DEBUG:tftpy:found a null at length 14, now have 1
DEBUG:tftpy:found a null at length 8, now have 2
DEBUG:tftpy:hopefully found end of mode at length 23
DEBUG:tftpy:about to unpack buffer with format: 14sx8sx
DEBUG:tftpy:unpacking buffer: 'mainconfig.pcc\x00netascii\x00'
DEBUG:tftpy:set filename to mainconfig.pcc
DEBUG:tftpy:set mode to netascii
DEBUG:tftpy:decode_options: buffer is: ''
DEBUG:tftpy:size of buffer is 0 bytes
DEBUG:tftpy:size of buffer is zero, returning empty hash
DEBUG:tftpy:in TftpPacketWithOptions.setoptions
DEBUG:tftpy:options: {}
DEBUG:tftpy:setting options hash to: {}
DEBUG:tftpy:in TftpPacketWithOptions.getoptions
DEBUG:tftpy:TftpContextServer.start() - factory returned a RRQ packet: filename = mainconfig.pcc mode = netascii
DEBUG:tftpy:In TftpStateServerStart.handle
DEBUG:tftpy:Handling an RRQ packet
DEBUG:tftpy:In TftpStateServerRecvRRQ.handle
DEBUG:tftpy:in TftpPacketWithOptions.getoptions
INFO:tftpy:Setting tidport to 1025
DEBUG:tftpy:Setting default options, blksize
DEBUG:tftpy:Requested filename is mainconfig.pcc
DEBUG:tftpy:full_path is F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig\mainconfig.pcc
INFO:tftpy:requested file is in the server root - good
INFO:tftpy:Opening file F:\Users\Erwin\OneDrive\ClaraNet\ClaraNetScripts\SendConfig\mainconfig.pcc for reading
DEBUG:tftpy:No requested options, starting send...
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 1
INFO:tftpy:Currently handling these sessions:
INFO:tftpy:    192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 1
INFO:tftpy:Received ACK for packet 1
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 2
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 2
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 2
INFO:tftpy:Received ACK for packet 2
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 3
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 3
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 3
INFO:tftpy:Received ACK for packet 3
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 4
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 4
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 4
INFO:tftpy:Received ACK for packet 4
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 5
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 5
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 5
INFO:tftpy:Received ACK for packet 5
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 6
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 6
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 6
INFO:tftpy:Received ACK for packet 6
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 7
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 7
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 7
INFO:tftpy:Received ACK for packet 7
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 8
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 8
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 8
INFO:tftpy:Received ACK for packet 8
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 9
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 9
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 9
INFO:tftpy:Received ACK for packet 9
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 10
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 10
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 10
INFO:tftpy:Received ACK for packet 10
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 11
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 11
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 11
INFO:tftpy:Received ACK for packet 11
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 12
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 12
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 12
INFO:tftpy:Received ACK for packet 12
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 13
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 13
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 13
INFO:tftpy:Received ACK for packet 13
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 14
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 14
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 14
INFO:tftpy:Received ACK for packet 14
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 15
DEBUG:tftpy:Read 512 bytes into buffer
DEBUG:tftpy:Sending DAT packet 15
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 15
INFO:tftpy:Received ACK for packet 15
DEBUG:tftpy:Good ACK, sending next DAT
DEBUG:tftpy:Incremented next_block to 16
DEBUG:tftpy:Read 472 bytes into buffer
INFO:tftpy:Reached EOF on file mainconfig.pcc
DEBUG:tftpy:Sending DAT packet 16
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 <tftpy.TftpStates.TftpStateExpectACK object at 0x03968290>
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>, <socket._socketobject object at 0x0396F0A0>]
INFO:tftpy:Matched input to session key 192.168.178.3:1025
DEBUG:tftpy:Received 4 bytes from 192.168.178.3:1025
DEBUG:tftpy:parsing a 4 byte packet
DEBUG:tftpy:opcode is 4
DEBUG:tftpy:decoded ACK packet: opcode = 4, block = 16
INFO:tftpy:Received ACK for packet 16
INFO:tftpy:Received ACK to final DAT, we're done.
INFO:tftpy:Successful transfer.
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:checking for timeout on session 192.168.178.3:1025 None
DEBUG:tftpy:Iterating deletion list.
INFO:tftpy:
INFO:tftpy:Session 192.168.178.3:1025 complete
DEBUG:tftpy:Gathering up metrics from session before deleting
DEBUG:tftpy:in TftpContext.end
DEBUG:tftpy:self.fileobj is open - closing
DEBUG:tftpy:Set metrics.end_time to 1471218358.61
DEBUG:tftpy:TftpMetrics.compute: duration is 1.05900001526
DEBUG:tftpy:TftpMetrics.compute: kbps is 60.1392814753
INFO:tftpy:Transferred 8152 bytes in 1.06 seconds
INFO:tftpy:Average rate: 60.14 kbps
INFO:tftpy:0.00 bytes in resent data
INFO:tftpy:0 duplicate packets
DEBUG:tftpy:Deleting session 192.168.178.3:1025
DEBUG:tftpy:Session list is now {}
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]
DEBUG:tftpy:Looping on all sessions to check for timeouts
DEBUG:tftpy:Iterating deletion list.
DEBUG:tftpy:shutdown_immediately is False
DEBUG:tftpy:shutdown_gracefully is False
DEBUG:tftpy:Performing select on this inputlist: [<socket._socketobject object at 0x0396F0D8>]

[JFC-MC]

Good news! It seems netascii transfer mode(RFC 764 as it's stated on the https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol) is already implemented in another python-based tftp server. So I guess it can be easily integrated in tftpy.
https://github.com/shylent/python-tx-tftp/blob/master/tftp/netascii.py (about 150 lines of code, MIT License allows free copying/modification of code AFAIK).

I can perform tests on this new and long-awaited feature of tftpy! )

Thanks in advance!