#!/bin/sh
case "$1" in
  ""|-h*|--h*) cat >&2 <<END
Tunnel to specified ESP client via shore
1st arg is the ESP's name (not its hostname) or corresponding TCP port on shore
Any additional arguments are passed to espclient  -- 1/27/20 brent@mbari.org

Environment:
sshArgs=additional arguments passed to ssh instead of the default "shore"
If sshArgs set to "-", no new local port forwarder is started
END
  exit 2 #'
;;  #map ESP names to their corresponding ESPcmdPorts on shore server
  brent)   tunPort=12060
;;
  moe)     tunPort=12191
;;
  *) tunPort=$1
esac
shift
: ${sshArgs:=shore}
[ "$sshArgs" != "-" ] && {
  fuser -skn tcp $tunPort
  trap "fuser -skn tcp $tunPort" EXIT HUP QUIT INT TERM
  ssh -oExitOnForwardFailure=yes \
    -nNL$tunPort:ESPshore.mbari.org:$tunPort $sshArgs 2>/dev/null &
  sleep 1  #allow time for forwarder to start
}
espclient --remote=localhost:$tunPort "$@"