dynamic-forward.sh revision 1.4 
1#	$OpenBSD: dynamic-forward.sh,v 1.4 2004/06/22 22:55:56 dtucker Exp $
2#	Placed in the Public Domain.
3
4tid="dynamic forwarding"
5
6FWDPORT=`expr $PORT + 1`
7
8if [ -x "`which nc`" ] && nc -h 2>&1 | grep "proxy address" >/dev/null; then
9	proxycmd="nc -x 127.0.0.1:$FWDPORT -X"
10elif [ -x "`which connect`" ]; then
11	proxycmd="connect -S 127.0.0.1:$FWDPORT -"
12else
13	echo "skipped (no suitable ProxyCommand found)"
14	exit 0
15fi
16trace "will use ProxyCommand $proxycmd"
17
18start_sshd
19
20for p in 1 2; do
21	trace "start dynamic forwarding, fork to background"
22	${SSH} -$p -F $OBJ/ssh_config -f -D $FWDPORT -q somehost \
23		exec sh -c \'"echo \$\$ > $OBJ/remote_pid; exec sleep 444"\'
24
25	for s in 4 5; do
26	    for h in 127.0.0.1 localhost; do
27		trace "testing ssh protocol $p socks version $s host $h"
28		${SSH} -F $OBJ/ssh_config \
29			-o "ProxyCommand ${proxycmd}${s} $h $PORT" \
30			somehost cat /bin/ls > $OBJ/ls.copy
31		test -f $OBJ/ls.copy	 || fail "failed copy /bin/ls"
32		cmp /bin/ls $OBJ/ls.copy || fail "corrupted copy of /bin/ls"
33	    done
34	done
35
36	if [ -f $OBJ/remote_pid ]; then
37		remote=`cat $OBJ/remote_pid`
38		trace "terminate remote shell, pid $remote"
39		if [ $remote -gt 1 ]; then
40			kill -HUP $remote
41		fi
42	else
43		fail "no pid file: $OBJ/remote_pid"
44	fi
45done
46