NAME

urelay —

a UCSPI-based relay

SYNOPSIS

urelay [-hqVv] [-M msgsrc] [-m msgdst] [-S ignsrc] [-s igndst]

DESCRIPTION

The urelay tool is a simple relay client, based on Prof. Daniel J. Bernstein's UCSPI input/output framework. It expects to be executed by a UCSPI client application, and relays all data received on the standard input to the UCSPI output channel, and all data received on the UCSPI input channel to the standard output.

The following options are available:

-h: Display a short help message and exit.
-M msgsrc: Send the specified string to the incoming connection as soon as the forwarding tunnel has been established.
-m msgdst: Send the specified string to the outgoing connection as soon as the forwarding tunnel has been established.
-S ignsrc: If the incoming connection's data stream starts with the specified string, ignore it - do not send it to the outgoing connection.
-s igndst: If the outgoing connection's data stream starts with the specified string, ignore it - do not send it to the incoming connection.
-q: Quiet operation. urelay is even more quiet when more than one -q flag is specified.
-V: Display version information and exit. When combined with one or more -v switches,
-v: Verbose operation. urelay is even more verbose when more than one -v flag is specified. urelay also attempts to display information about its build environment.

ENVIRONMENT

Not taken in consideration in the present version.

FILES

None relevant in the present version.

BUGS

There should be a way to specify non-socket-specific behavior, e.g. skip fcntl(2) and shutdown(2) calls.

HISTORY

The urelay utility and this manual page was written by Peter Pentchev in 2002.

AUTHORS

Peter Pentchev ⟨roam@ringlet.net⟩.