mTCP 2020-01-01 Release Notes

This release is mostly for bug fixes, but there is a significant improvement to how TCP handles dropped packets on long streaming data transfers. There were no major changes to the way applications are used.

TCP/IP Library fixes and improvements:

Add support to shrink and grow the TCP receive window as connection quality changes. This will help keep connections from dropping when packets are being lost.
Add statistics for UDP and ARP; add checksum error count to TCP; remove redundant stats from IP.
Fix a bug with the preferred nameserver support.
Rewrite Utils::dumpBytes to be more efficient.
Add a warning for whitespace detected at the end of lines in the config file. Treat lines in the config file that are too long has hard errors.

Application fixes and improvements:

FTP:

Stuff a BIN command on the command socket as soon as the user logs in to avoid the problem where a server defaults to ASCII and a user forgets to set BIN. Also provide a configuration file override for that behavior for power users.
Remove direct screen writes from the FTP client to improve compatibility with screen speedup programs.
Make password optional. (Accounts with no password are legal.)

FTP Server: Fix an old issue where using the sandbox with the root of a drive fails.
HTGET:

Add HTTP 0.9 support.
Only set STDOUT to binary mode if it is piped to a file.
Defend better against headers being too long.
Properly support chunked transport encoding as required by the HTTP spec.
Add "quiet mode" option.
Check return codes properly on file operations.

HTTPServ: Increase the maximum HTTP request buffer size to improve compatibility with very verbose clients.
IRCjr:

Lengthen IRC fields so that ZNC can be used.
Add a work-around for CGA snow.

Telnet:

Implement delete key support.
Terminal emulation fixes: implement ESC c (reset terminal), add save and restore cursor (DECSC and DECRC), exit “overhang” area when an ESC char is detected.
Add a work-around for CGA snow.
Add a CGA_MONO color palette.
Avoid dropping outgoing data when we don’t have available transmit buffers.