Skip to content

A proxy server that joins together pairs of incoming TCP connections

License

Notifications You must be signed in to change notification settings

1Hyena/tcpcoupler

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

42 Commits
 
 
 
 
 
 
 
 

Repository files navigation

TCP Coupler v1.14

This Linux program is a proxy server that joins together pairs of incoming TCP connections. It listens simultaneously on two ports (supply and demand) and connects any new client on the demand port with a client waiting on the supply port.

Usage: ./tcpcoupler [options] supply-port demand-port [driver-port]
Options:
      --brief         Print brief information (default).
  -h  --help          Display this usage information.
  -p  --period        Driver refresh period in seconds (30).
  -t  --timeout       Connection idle timeout in seconds (60).
      --verbose       Print verbose information.
  -v  --version       Show version information.

Driver Port

If the driver port command line parameter is provided, then the number of connections waiting on the demand port is sent to all clients connected to the driver port.

Below is given an example setup that makes use of the driver-port parameter. Let's say a tcpcoupler instance is running on the remotehost domain, having port 5000 for its suppy-port, port 6000 for its demand-port and port 7000 for its driver-port. We now wish to provide some TCP service running on localhost port 4000 from the mentioned remote host. To do so, we utilize the netcat, xargs and tcpnipple tools.

nc remotehost 7000 | \
xargs -I {} -P 0 ./tcpnipple -c {} localhost 4000 remotehost 5000

Every time a new connection is made to remotehost:6000, the number of waiting connections is sent via the driver-port to the netcat instance. The latter will forward that number to xargs which in turn spawns tcpnipple, connecting the server on localhost:4000 to the server on remotehost:5000.

About

A proxy server that joins together pairs of incoming TCP connections

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published