1255670Sdes# $OpenBSD: dynamic-forward.sh,v 1.10 2013/05/17 04:29:14 dtucker Exp $ 2124208Sdes# Placed in the Public Domain. 3124208Sdes 4124208Sdestid="dynamic forwarding" 5124208Sdes 6137015SdesFWDPORT=`expr $PORT + 1` 7137015Sdes 8128456Sdesif have_prog nc && nc -h 2>&1 | grep "proxy address" >/dev/null; then 9124208Sdes proxycmd="nc -x 127.0.0.1:$FWDPORT -X" 10124208Sdeselif have_prog connect; then 11124208Sdes proxycmd="connect -S 127.0.0.1:$FWDPORT -" 12124208Sdeselse 13124208Sdes echo "skipped (no suitable ProxyCommand found)" 14124208Sdes exit 0 15124208Sdesfi 16124208Sdestrace "will use ProxyCommand $proxycmd" 17124208Sdes 18124208Sdesstart_sshd 19124208Sdes 20124208Sdesfor p in 1 2; do 21225825Sdes n=0 22225825Sdes error="1" 23124208Sdes trace "start dynamic forwarding, fork to background" 24225825Sdes while [ "$error" -ne 0 -a "$n" -lt 3 ]; do 25225825Sdes n=`expr $n + 1` 26225825Sdes ${SSH} -$p -F $OBJ/ssh_config -f -D $FWDPORT -q \ 27225825Sdes -oExitOnForwardFailure=yes somehost exec sh -c \ 28225825Sdes \'"echo \$\$ > $OBJ/remote_pid; exec sleep 444"\' 29225825Sdes error=$? 30225825Sdes if [ "$error" -ne 0 ]; then 31225825Sdes trace "forward failed proto $p attempt $n err $error" 32225825Sdes sleep $n 33225825Sdes fi 34225825Sdes done 35225825Sdes if [ "$error" -ne 0 ]; then 36225825Sdes fatal "failed to start dynamic forwarding proto $p" 37225825Sdes fi 38124208Sdes 39124208Sdes for s in 4 5; do 40124208Sdes for h in 127.0.0.1 localhost; do 41124208Sdes trace "testing ssh protocol $p socks version $s host $h" 42124208Sdes ${SSH} -F $OBJ/ssh_config \ 43124208Sdes -o "ProxyCommand ${proxycmd}${s} $h $PORT" \ 44124208Sdes somehost cat $DATA > $OBJ/ls.copy 45124208Sdes test -f $OBJ/ls.copy || fail "failed copy $DATA" 46124208Sdes cmp $DATA $OBJ/ls.copy || fail "corrupted copy of $DATA" 47124208Sdes done 48124208Sdes done 49124208Sdes 50124208Sdes if [ -f $OBJ/remote_pid ]; then 51124208Sdes remote=`cat $OBJ/remote_pid` 52124208Sdes trace "terminate remote shell, pid $remote" 53124208Sdes if [ $remote -gt 1 ]; then 54124208Sdes kill -HUP $remote 55124208Sdes fi 56124208Sdes else 57124208Sdes fail "no pid file: $OBJ/remote_pid" 58124208Sdes fi 59124208Sdesdone 60