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# $OpenBSD: forwarding.sh,v 1.4 2002/03/15 13:08:56 markus Exp $
# Placed in the Public Domain.
tid="local and remote forwarding"
DATA=/bin/ls${EXEEXT}
start_sshd
base=33
last=$PORT
fwd=""
for j in 0 1 2; do
for i in 0 1 2; do
a=$base$j$i
b=`expr $a + 50`
c=$last
# fwd chain: $a -> $b -> $c
fwd="$fwd -L$a:127.0.0.1:$b -R$b:127.0.0.1:$c"
last=$a
done
done
for p in 1 2; do
q=`expr 3 - $p`
trace "start forwarding, fork to background"
${SSH} -$p -F $OBJ/ssh_config -f $fwd somehost sleep 10
trace "transfer over forwarded channels and check result"
${SSH} -$q -F $OBJ/ssh_config -p$last -o 'ConnectionAttempts=4' \
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"
sleep 10
done
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