dynamic-forward.sh revision 1.2 
1#	$OpenBSD: dynamic-forward.sh,v 1.2 2003/07/03 08:21:46 markus Exp $
2#	Placed in the Public Domain.
3
4tid="dynamic forwarding"
5
6PORT=4242
7FWDPORT=4243
8
9if [ -x `which nc` ] && nc -h 2>&1 | grep "x proxy address" >/dev/null; then
10	proxycmd="nc -x 127.0.0.1:$FWDPORT -X"
11elif [ -x `which connect` ]; then
12	proxycmd="connect -S 127.0.0.1:$FWDPORT -"
13else
14	echo "skipped (no suitable ProxyCommand found)"
15	exit 0
16fi
17trace "will use ProxyCommand $proxycmd"
18
19start_sshd
20
21for p in 1 2; do
22	trace "start dynamic forwarding, fork to background"
23	${SSH} -$p -F $OBJ/ssh_config -f -D $FWDPORT -q somehost \
24		exec sh -c \'"echo \$\$ > $OBJ/remote_pid; exec sleep 444"\'
25
26	for s in 4 5; do
27	    for h in 127.0.0.1 localhost; do
28		trace "testing ssh protocol $p socks version $s host $h"
29		${SSH} -F $OBJ/ssh_config \
30			-o "ProxyCommand ${proxycmd}${s} $h $PORT" \
31			somehost cat /bin/ls > $OBJ/ls.copy
32		test -f $OBJ/ls.copy	 || fail "failed copy /bin/ls"
33		cmp /bin/ls $OBJ/ls.copy || fail "corrupted copy of /bin/ls"
34	    done
35	done
36
37	if [ -f $OBJ/remote_pid ]; then
38		remote=`cat $OBJ/remote_pid`
39		trace "terminate remote shell, pid $remote"
40		if [ $remote -gt 1 ]; then
41			kill -HUP $remote
42		fi
43	else
44		fail "no pid file: $OBJ/remote_pid"
45	fi
46done
47