These bash scripts offer a speedy method for sending a file from a client to a server using TCP/IP networking. Scp could be used for this purpose, but will often be slower. These scripts do not employ encryption of any sort, so they are most suitable for use where both client and server are contained in a secure environment such as a VPN.
Both client and server require that socat be in the shell PATH. If you have
pv (pipe viewer) in your path, you can "tune" the client program to use it.
This would yield an animated progress bar while transferring a file.
This is the server, it receives files from clients. Launch it once and it will service multiple clients. Launch without arguments to obtain a help message. At the top of the file are some tuning parameters that you can change.
This is the client, it sends a single file to a remote server ('srecv_server2`). Launch it once and it will service multiple clients. Launch without arguments to obtain a help message. At the top of the file are some tuning parameters that you can change.
I have tested ssend2 on Linux. I have tested srecv_server2 on MacOS.
The chunksize tuning paramter is featured at the top of both
scripts. A value of 1314 may be helpful if the data exchange is within
a Cisco AnyConnect[tm] VPN. Inspecting packet sizes with tcpdump
gave me this idea.
The client program ssend2 does not provide feedback when the server
encounters an error.