62 lines
1.5 KiB
Bash
62 lines
1.5 KiB
Bash
# $OpenBSD: dynamic-forward.sh,v 1.9 2011/06/03 00:29:52 dtucker Exp $
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# Placed in the Public Domain.
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tid="dynamic forwarding"
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FWDPORT=`expr $PORT + 1`
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DATA=/bin/ls${EXEEXT}
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if have_prog nc && nc -h 2>&1 | grep "proxy address" >/dev/null; then
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proxycmd="nc -x 127.0.0.1:$FWDPORT -X"
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elif have_prog connect; then
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proxycmd="connect -S 127.0.0.1:$FWDPORT -"
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else
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echo "skipped (no suitable ProxyCommand found)"
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exit 0
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fi
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trace "will use ProxyCommand $proxycmd"
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start_sshd
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for p in 1 2; do
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n=0
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error="1"
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trace "start dynamic forwarding, fork to background"
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while [ "$error" -ne 0 -a "$n" -lt 3 ]; do
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n=`expr $n + 1`
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${SSH} -$p -F $OBJ/ssh_config -f -D $FWDPORT -q \
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-oExitOnForwardFailure=yes somehost exec sh -c \
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\'"echo \$\$ > $OBJ/remote_pid; exec sleep 444"\'
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error=$?
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if [ "$error" -ne 0 ]; then
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trace "forward failed proto $p attempt $n err $error"
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sleep $n
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fi
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done
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if [ "$error" -ne 0 ]; then
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fatal "failed to start dynamic forwarding proto $p"
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fi
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for s in 4 5; do
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for h in 127.0.0.1 localhost; do
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trace "testing ssh protocol $p socks version $s host $h"
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${SSH} -F $OBJ/ssh_config \
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-o "ProxyCommand ${proxycmd}${s} $h $PORT" \
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somehost cat $DATA > $OBJ/ls.copy
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test -f $OBJ/ls.copy || fail "failed copy $DATA"
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cmp $DATA $OBJ/ls.copy || fail "corrupted copy of $DATA"
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done
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done
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if [ -f $OBJ/remote_pid ]; then
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remote=`cat $OBJ/remote_pid`
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trace "terminate remote shell, pid $remote"
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if [ $remote -gt 1 ]; then
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kill -HUP $remote
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fi
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else
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fail "no pid file: $OBJ/remote_pid"
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fi
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done
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