SNMP frontend: changed default mibyang dir to /share/mib-yangs to be same as repo

Test: new prel test_snmp_ifmib.sh

test/test_snmp_ifmib.sh

@@ -0,0 +1,120 @@
+#!/usr/bin/env bash
+# SNMP "smoketest" Basic snmpget test for a scalar
+
+# Magic line must be first in script (see README.md)
+s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi
+
+# Re-use main example backend state callbacks
+APPNAME=example
+
+if [ ${ENABLE_NETSNMP} != "yes" ]; then
+    echo "Skipping test, Net-SNMP support not enabled."
+    if [ "$s" = $0 ]; then exit 0; else return 0; fi
+fi
+
+snmpd=$(type -p snmpd)
+snmpget="$(type -p snmpget) -On -c public -v2c localhost "
+snmpgetnext="$(type -p snmpgetnext) -On -c public -v2c localhost "
+
+cfg=$dir/conf_startup.xml
+fyang=$dir/clixon-example.yang
+fstate=$dir/state.xml
+
+# AgentX unix socket
+SOCK=/var/run/snmp.sock
+
+# Relies on example_backend.so for $fstate file handling
+
+cat <<EOF > $cfg
+<clixon-config xmlns="http://clicon.org/config">
+  <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
+  <CLICON_YANG_DIR>${YANG_INSTALLDIR}</CLICON_YANG_DIR>
+  <CLICON_YANG_DIR>${YANG_STANDARD_DIR}</CLICON_YANG_DIR>
+  <CLICON_YANG_DIR>${MIB_GENERATED_YANG_DIR}</CLICON_YANG_DIR>
+  <CLICON_YANG_MAIN_FILE>$fyang</CLICON_YANG_MAIN_FILE>
+  <CLICON_SOCK>$dir/$APPNAME.sock</CLICON_SOCK>
+  <CLICON_BACKEND_DIR>/usr/local/lib/$APPNAME/backend</CLICON_BACKEND_DIR>
+  <CLICON_BACKEND_PIDFILE>/var/tmp/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
+  <CLICON_XMLDB_DIR>$dir</CLICON_XMLDB_DIR>
+  <CLICON_SNMP_AGENT_SOCK>unix:$SOCK</CLICON_SNMP_AGENT_SOCK>
+  <CLICON_SNMP_MIB>IF-MIB</CLICON_SNMP_MIB>
+</clixon-config>
+EOF
+
+cat <<EOF > $fyang
+module clixon-example{
+  yang-version 1.1;
+  namespace "urn:example:clixon";
+  prefix ex;
+  import IF-MIB {
+      prefix "if-mib";
+  }
+}
+EOF
+
+# This is state data written to file that backend reads from (on request)
+# integer and string have values, sleeper does not and uses default (=1)
+cat <<EOF > $fstate
+  <NET-SNMP-EXAMPLES-MIB xmlns="urn:ietf:params:xml:ns:yang:smiv2:NET-SNMP-EXAMPLES-MIB">
+    <netSnmpExampleScalars>
+      <netSnmpExampleInteger>42</netSnmpExampleInteger>
+      <!--  netSnmpExampleSleeper>1</netSnmpExampleSleeper -->
+      <netSnmpExampleString>This is not default</netSnmpExampleString>
+    </netSnmpExampleScalars>
+  </NET-SNMP-EXAMPLES-MIB>
+EOF
+
+function testinit(){
+    new "test params: -f $cfg -- -sS $fstate"
+    if [ $BE -ne 0 ]; then
+	# Kill old backend and start a new one
+	new "kill old backend"
+	sudo clixon_backend -zf $cfg
+	if [ $? -ne 0 ]; then
+	    err "Failed to start backend"
+	fi
+
+	sudo pkill -f clixon_backend
+
+	new "Starting backend"
+	start_backend -s init -f $cfg -- -sS $fstate
+    fi
+
+    new "wait backend"
+    wait_backend
+	
+    if [ $CS -ne 0 ]; then
+	# Kill old clixon_snmp, if any
+	new "Terminating any old clixon_snmp processes"
+	sudo killall -q clixon_snmp
+
+	new "Starting clixon_snmp"
+	start_snmp $cfg &
+    fi
+
+    new "wait snmp"
+    wait_snmp
+}
+
+function testexit(){
+    stop_snmp
+}
+
+new "SNMP tests"
+testinit
+
+# IF-MIB::interfaces
+MIB=".1.3.6.1.2.1"
+OID1="${MIB}.2.1.0"   # XXX interfaces
+OID2="${MIB}.31"   # ifMIB
+
+new "$snmpget"
+
+new "Test SNMP get int"
+expectpart "$($snmpget $OID1)" 0 "$OID1 = INTEGER: 8"
+
+new "Cleaning up"
+testexit
+
+new "endtest"
+endtest