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# $OpenBSD: dynamic-forward.sh,v 1.6 2011/05/20 06:32:30 dtucker Exp $
# Placed in the Public Domain.
tid="dynamic forwarding"
FWDPORT=`expr $PORT + 1`
DATA=/bin/ls${EXEEXT}
if have_prog nc && nc -h 2>&1 | grep "proxy address" >/dev/null; then
proxycmd="nc -x 127.0.0.1:$FWDPORT -X"
elif have_prog connect; then
proxycmd="connect -S 127.0.0.1:$FWDPORT -"
else
echo "skipped (no suitable ProxyCommand found)"
exit 0
fi
trace "will use ProxyCommand $proxycmd"
start_sshd
for p in 1 2; do
trace "start dynamic forwarding, fork to background"
rm -f $OBJ/remote_pid
${SSH} -$p -F $OBJ/ssh_config -D $FWDPORT -q somehost \
exec sh -c \'"echo \$\$ > $OBJ/remote_pid; exec sleep 444"\' &
client_pid=$!
# Wait for ssh to start
n=0
while test ! -f $OBJ/remote_pid; do
sleep 1
n=`expr $n + 1`
if test $n -gt 60; then
kill $client_pid
fail "Timed out waiting for client to connect"
fi
done
for s in 4 5; do
for h in 127.0.0.1 localhost; do
trace "testing ssh protocol $p socks version $s host $h"
${SSH} -F $OBJ/ssh_config \
-o "ProxyCommand ${proxycmd}${s} $h $PORT" \
somehost cat $DATA > $OBJ/ls.copy
test -f $OBJ/ls.copy || fail "failed copy $DATA"
cmp $DATA $OBJ/ls.copy || fail "corrupted copy of $DATA"
done
done
if [ -f $OBJ/remote_pid ]; then
remote=`cat $OBJ/remote_pid`
trace "terminate remote shell, pid $remote"
if [ $remote -gt 1 ]; then
kill -HUP $remote
fi
rm -f $OBJ/remote_pid
else
fail "no pid file: $OBJ/remote_pid"
fi
# Wait for listening ssh to terminate
wait
# Must allow time for connection tear-down
sleep 2
done
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