Fix race conditions in forwarding tests

The forwarding tests sometimes seem to fail in a way that suggests ports
are in use even though they shouldn't be.  Convert more of them to use a
mux socket rather than relying on sleeps in the hope that that makes
behaviour more consistent.

Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=2659
Patch-Name: regress-forwarding-race.patch

Last-Update: 2017-01-02

1 files changed, 19 insertions, 13 deletions

diff --git a/regress/forwarding.sh b/regress/forwarding.sh
index 2539db9b7..a1a4b13f2 100644
--- a/regress/forwarding.sh
+++ b/regress/forwarding.sh
@@ -11,7 +11,6 @@ base=33
 last=$PORT
 fwd=""
 CTL=$OBJ/ctl-sock
-rm -f $CTL
 
 for j in 0 1 2; do
         for i in 0 1 2; do
@@ -29,7 +28,8 @@ for p in ${SSH_PROTOCOLS}; do
                 q=$p
         fi
         trace "start forwarding, fork to background"
-        ${SSH} -$p -F $OBJ/ssh_config -f $fwd somehost sleep 10
+        rm -f $CTL
+        ${SSH} -S $CTL -M -$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' \
@@ -37,7 +37,7 @@ for p in ${SSH_PROTOCOLS}; do
         test -s ${COPY}         || fail "failed copy of ${DATA}"
         cmp ${DATA} ${COPY}     || fail "corrupted copy of ${DATA}"
 
-        sleep 10
+        ${SSH} -S $CTL -O exit somehost
 done
 
 for p in ${SSH_PROTOCOLS}; do
@@ -75,7 +75,8 @@ for p in ${SSH_PROTOCOLS}; do
         ${SSH} -$p -F $OBJ/ssh_config -oClearAllForwardings=yes somehost true
 
         trace "clear local forward proto $p"
-        ${SSH} -$p -f -F $OBJ/ssh_config -L ${base}01:127.0.0.1:$PORT \
+        rm -f $CTL
+        ${SSH} -S $CTL -M -$p -f -F $OBJ/ssh_config -L ${base}01:127.0.0.1:$PORT \
             -oClearAllForwardings=yes somehost sleep 10
         if [ $? != 0 ]; then
                 fail "connection failed with cleared local forwarding"
@@ -85,10 +86,11 @@ for p in ${SSH_PROTOCOLS}; do
                      >>$TEST_REGRESS_LOGFILE 2>&1 && \
                         fail "local forwarding not cleared"
         fi
-        sleep 10
+        ${SSH} -S $CTL -O exit somehost
         
         trace "clear remote forward proto $p"
-        ${SSH} -$p -f -F $OBJ/ssh_config -R ${base}01:127.0.0.1:$PORT \
+        rm -f $CTL
+        ${SSH} -S $CTL -M -$p -f -F $OBJ/ssh_config -R ${base}01:127.0.0.1:$PORT \
             -oClearAllForwardings=yes somehost sleep 10
         if [ $? != 0 ]; then
                 fail "connection failed with cleared remote forwarding"
@@ -98,7 +100,7 @@ for p in ${SSH_PROTOCOLS}; do
                      >>$TEST_REGRESS_LOGFILE 2>&1 && \
                         fail "remote forwarding not cleared"
         fi
-        sleep 10
+        ${SSH} -S $CTL -O exit somehost
 done
 
 for p in 2; do
@@ -115,6 +117,7 @@ echo "LocalForward ${base}01 127.0.0.1:$PORT" >> $OBJ/ssh_config
 echo "RemoteForward ${base}02 127.0.0.1:${base}01" >> $OBJ/ssh_config
 for p in ${SSH_PROTOCOLS}; do
         trace "config file: start forwarding, fork to background"
+        rm -f $CTL
         ${SSH} -S $CTL -M -$p -F $OBJ/ssh_config -f somehost sleep 10
 
         trace "config file: transfer over forwarded channels and check result"
@@ -129,15 +132,18 @@ done
 for p in 2; do
         trace "transfer over chained unix domain socket forwards and check result"
         rm -f $OBJ/unix-[123].fwd
-        ${SSH} -f -F $OBJ/ssh_config -R${base}01:[$OBJ/unix-1.fwd] somehost sleep 10
-        ${SSH} -f -F $OBJ/ssh_config -L[$OBJ/unix-1.fwd]:[$OBJ/unix-2.fwd] somehost sleep 10
-        ${SSH} -f -F $OBJ/ssh_config -R[$OBJ/unix-2.fwd]:[$OBJ/unix-3.fwd] somehost sleep 10
-        ${SSH} -f -F $OBJ/ssh_config -L[$OBJ/unix-3.fwd]:127.0.0.1:$PORT somehost sleep 10
+        rm -f $CTL $CTL.[123]
+        ${SSH} -S $CTL -M -f -F $OBJ/ssh_config -R${base}01:[$OBJ/unix-1.fwd] somehost sleep 10
+        ${SSH} -S $CTL.1 -M -f -F $OBJ/ssh_config -L[$OBJ/unix-1.fwd]:[$OBJ/unix-2.fwd] somehost sleep 10
+        ${SSH} -S $CTL.2 -M -f -F $OBJ/ssh_config -R[$OBJ/unix-2.fwd]:[$OBJ/unix-3.fwd] somehost sleep 10
+        ${SSH} -S $CTL.3 -M -f -F $OBJ/ssh_config -L[$OBJ/unix-3.fwd]:127.0.0.1:$PORT somehost sleep 10
         ${SSH} -F $OBJ/ssh_config -p${base}01 -o 'ConnectionAttempts=4' \
                 somehost cat ${DATA} > ${COPY}
         test -s ${COPY}                 || fail "failed copy ${DATA}"
         cmp ${DATA} ${COPY}             || fail "corrupted copy of ${DATA}"
 
-        #wait
-        sleep 10
+        ${SSH} -S $CTL -O exit somehost
+        ${SSH} -S $CTL.1 -O exit somehost
+        ${SSH} -S $CTL.2 -O exit somehost
+        ${SSH} -S $CTL.3 -O exit somehost
 done