This is a simple clone of netcat in golang. I wrote it many moons ago as my first go program. It is slightly different from the traditional netcat in the following ways:

• adds sha256 checksum on network I/O
• traffic stats (number of bytes sent/received)
• hexdump of the traffic
• Bi directional I/O is optional; server always writes to stdout and client always reads from stdin. This makes it easy to remember.

You will need Go 1.5 or later:

git clone https://github.com/opencoff/go-nc
cd go-nc
make

gonc comes with helpful commandline options. Try:

./bin/gonc -h

Or the long-form:

./bin/gonc --help

Lets say that we wish to send a directory's contents to a server whose IP address is a.b.c.d. On that server create a listening instance of 'gonc':

./bin/gonc -c -l :9090 > foo.tar.gz

And on a client try:

tar cf - . | gzip -9 | ./bin/gonc -c -v a.b.c.d:9090

In the example above, all I/O is checksummed on both sides.