Finish running successfully if IPv4 addresses work, but IPv6 addresses do not work

SiteTests/FroNtier/tests/CE-cms-squid

@@ -2,7 +2,7 @@
 
 shopt -s expand_aliases
 
-SCRIPT_REVISION="2020-12-01"
+SCRIPT_REVISION="2020-12-03"
 MAINTAINERS="Dave Dykstra and Edita Kizinevic"
 SCRIPT_NAME=`basename "$0"`
 
@@ -169,6 +169,10 @@ check_proxies() {
                 hostname=${hostname%:*}
                 IPv4_addresses=`getent ahostsv4 $hostname | awk '/STREAM/{print $1}'`
                 IPv6_addresses=`getent ahostsv6 $hostname | awk '/STREAM/{print $1}' | grep -v ^::ffff:`
+                IPv4_and_IPv6_addresses_exist=false
+                if [ ! -z "$IPv4_addresses" ] && [ ! -z "$IPv6_addresses" ]; then
+                    IPv4_and_IPv6_addresses_exist=true
+                fi
                 if $3; then
                   if [ -z "$IPv4_addresses" ] && [ -z "$IPv6_addresses" ]; then
                     IP_addresses=$hostname
@@ -203,7 +207,15 @@ check_proxies() {
                         else
                             echo "$proxy_IP is FAILED:"
                             cat $output
-                            ever_failed=true
+                            if $IPv4_and_IPv6_addresses_exist; then
+                                if [[ $IP_address =~ .*:.* ]]; then
+                                    IPv6_ever_failed=true
+                                else
+                                    ever_failed=true
+                                fi
+                            else
+                                ever_failed=true
+                            fi
                         fi
                         echo "Query $proxy ended:" `date`
                         echo
@@ -244,38 +256,34 @@ debug_output="debug_output.txt"
 output="output.txt"
 ever_failed=false
 ever_succeeded=false
+IPv6_ever_failed=false
 found_proxyconfig=false
 found_proxy=false
 check_proxies "$FNCONNECT" $pilot $use_IPv6_addresses
 
 #Check test results
+if [ "$IPv6_ever_failed" == false ]; then
+    IPv6_message=""
+else
+    IPv6_message=" for IPv4 addresses, although at least one of proxies is FAILED for IPv6 addresses"
+fi
 if [ "$failover" == true ]; then
-    message=$'many database queries from the site have connected directly to the Frontier servers or backup proxies, with a high rate of queries not going through the local squid(s):\n'$result
-    if [ "$ever_failed" == false ] && [ "$ever_succeeded" == true ]; then
-        echo "Proxy test is OK, however $message"
-        exit $SAME_WARNING
-    elif [ "$ever_failed" == true ] && [ "$ever_succeeded" == true ]; then
-        echo "At least one of proxies is FAILED and $message"
-        exit $SAME_WARNING
-    elif [ "$found_proxy" == false ]; then
-        echo "No proxies are found and $message"
-        exit $SAME_WARNING
-    else
-        echo "Proxy test is FAILED and $message"
-        exit $SAME_ERROR
-    fi
+    failover_message=$' and many database queries from the site have connected directly to the Frontier servers or backup proxies, with a high rate of queries not going through the local squid(s):\n'$result
+    exit_code=$SAME_WARNING
 else
-    if [ "$ever_failed" == false ] && [ "$ever_succeeded" == true ]; then
-        echo "Proxy test is OK."
-        exit $SAME_OK
-    elif [ "$ever_failed" == true ] && [ "$ever_succeeded" == true ]; then
-        echo "At least one of proxies is FAILED."
-        exit $SAME_WARNING
-    elif [ "$found_proxy" == false ]; then
-        echo "No proxies are found."
-        exit $SAME_OK
-    else
-        echo "Proxy test is FAILED."
-        exit $SAME_ERROR
-    fi
+    failover_message=""
+    exit_code=$SAME_OK
+fi
+if [ "$ever_failed" == false ] && [ "$ever_succeeded" == true ]; then
+    echo "Proxy test is OK${IPv6_message}${failover_message}"
+    exit $exit_code
+elif [ "$ever_failed" == true ] && [ "$ever_succeeded" == true ]; then
+    echo "At least one of proxies is FAILED${failover_message}"
+    exit $SAME_WARNING
+elif [ "$found_proxy" == false ]; then
+    echo "No proxies are found${failover_message}"
+    exit $exit_code
+else
+    echo "Proxy test is FAILED${failover_message}"
+    exit $SAME_ERROR
 fi