rfc6243 with-defaults Capability for NETCONF

apps/backend/backend_get.c

@@ -721,7 +721,8 @@ get_common(clicon_handle        h,
     int             list_pagination = 0;
     cxobj         **xvec = NULL;
     size_t          xlen;
-    cxobj          *xlistpag;
+    cxobj          *xfind;
+    char	   *with_defaults;
     
     clicon_debug(1, "%s", __FUNCTION__);
     username = clicon_username_get(h);
@@ -762,14 +763,14 @@ get_common(clicon_handle        h,
 	}
     }
     /* Check if list pagination */
-    if ((xlistpag = xml_find_type(xe, NULL, "list-pagination", CX_ELMNT)) != NULL)
+    if ((xfind = xml_find_type(xe, NULL, "list-pagination", CX_ELMNT)) != NULL)
 	list_pagination = 1;
     /* Sanity check for list pagination: path must be a list/leaf-list, if it is,
      * check config/state
      */
     if (list_pagination){
 	if (get_list_pagination(h, ce,
-				xlistpag,
+				xfind,
 				content, db,
 				depth, yspec, xpath, nsc, username,
 				cbret) < 0)
@@ -842,7 +843,33 @@ get_common(clicon_handle        h,
 	}
 	break;
     }
-
+    /* rfc6243 Handle with-defaults. */
+    if ((xfind = xml_find(xe, "with-defaults")) != NULL) {
+	 if ((with_defaults = xml_find_value(xfind, "body")) != NULL) {
+	     if (strcmp(with_defaults, "explicit") == 0) {
+		/* Traverse XML and mark state nodes */
+		if (xml_non_config_data(xret, NULL) < 0)
+		    goto done;
+		/* Remove default configuration nodes from XML */
+		if (xml_tree_prune_flags(xret, XML_FLAG_DEFAULT, XML_FLAG_MARK|XML_FLAG_DEFAULT) < 0)
+		  goto done;
+	     }
+	     else if (strcmp(with_defaults, "report-all") == 0) {
+	       /* Accept mode, do nothing */
+	     }
+	     else {
+		 /* Mode not supported */
+		if ((cbmsg = cbuf_new()) == NULL){
+		    clicon_err(OE_UNIX, errno, "cbuf_new");
+		    goto done;
+		}
+		cprintf(cbmsg, "with-defaults retrieval mode \"%s\" is not supported", with_defaults);
+		if (netconf_operation_failed(cbret, "application", cbuf_get(cbmsg)) < 0)
+		    goto done;
+		goto ok;
+	     }
+	 }
+    }
     if (content != CONTENT_CONFIG &&
 	clicon_option_bool(h, "CLICON_VALIDATE_STATE_XML")){
 	/* Check XML  by validating it. return internal error with error cause 

lib/clixon/clixon_xml_map.h

@@ -59,6 +59,7 @@ int xml_diff(yang_stmt *yspec, cxobj *x0, cxobj *x1,
 	     cxobj ***changed_x0, cxobj ***changed_x1, int *changedlen);
 int xml_tree_prune_flagged_sub(cxobj *xt, int flag, int test, int *upmark);
 int xml_tree_prune_flagged(cxobj *xt, int flag, int test);
+int xml_tree_prune_flags(cxobj *xt, int flags, int mask);
 int xml_namespace_change(cxobj *x, char *ns, char *prefix);
 int xml_default_recurse(cxobj *xn, int state);
 int xml_global_defaults(clicon_handle h, cxobj *xn, cvec *nsc, const char *xpath, yang_stmt *yspec, int state);

lib/src/clixon_netconf_lib.c

@@ -1529,6 +1529,9 @@ netconf_module_load(clicon_handle h)
     /* Load ietf list pagination netconf */
     if (yang_spec_parse_module(h, "ietf-list-pagination-nc", NULL, yspec)< 0)
 	goto done;
+    /* Load rfc6243 with-defaults module explicit (imported by ietf-list-pagination-nc) */
+    if (yang_spec_parse_module(h, "ietf-netconf-with-defaults", NULL, yspec)< 0)
+	goto done;
     /* Framing: If hello protocol skipped, set framing direct, ie fix chunked framing if NETCONF-1.1
      * But start with default: RFC 4741 EOM ]]>]]>
      * For now this only applies to external protocol
@@ -1721,6 +1724,8 @@ netconf_hello_server(clicon_handle h,
     cprintf(cb, "<capability>urn:ietf:params:netconf:capability:startup:1.0</capability>");
     cprintf(cb, "<capability>urn:ietf:params:netconf:capability:xpath:1.0</capability>");
     cprintf(cb, "<capability>urn:ietf:params:netconf:capability:notification:1.0</capability>");
+    /* rfc6243 with-defaults capability modes */
+    cprintf(cb, "<capability>urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=explicit</capability>");
     cprintf(cb, "</capabilities>");
     if (session_id) 
 	cprintf(cb, "<session-id>%lu</session-id>", (long unsigned int)session_id);

lib/src/clixon_xml_map.c

@@ -561,6 +561,42 @@ xml_tree_prune_flagged(cxobj *xt,
     return retval;
 }
 
+/*! Prune everything that passes test
+ * @param[in]   xt      XML tree with some node marked
+ * @param[in]   flags   Flags set
+ * @param[in]   mask    Which flags to test for
+ * The function removes all branches that does pass test
+ * @code
+ *    xml_tree_prune_flaggs(xt, XML_FLAG_MARK, XML_FLAG_MARK|XML_FLAG_DEFAULT);
+ * @endcode
+ */
+int
+xml_tree_prune_flags(cxobj *xt,
+		       int    flags,
+		       int    mask)
+{
+    int        retval = -1;
+    cxobj     *x;
+    cxobj     *xprev;
+
+    x = NULL;
+    xprev = NULL;
+    while ((x = xml_child_each(xt, x, CX_ELMNT)) != NULL) {
+	if (xml_flag(x, mask) == flags){ 	/* Pass test means purge */
+	    if (xml_purge(x) < 0)
+		goto done;
+	    x = xprev;
+	    continue;
+	}
+	if (xml_tree_prune_flags(x, flags, mask) < 0)
+	    goto done;
+	xprev = x;
+    }
+    retval = 0;
+ done:
+    return retval;
+}
+
 /*! Add prefix:namespace pair to xml node, set cache, etc
  * @param[in]  x         XML node whose namespace should change
  * @param[in]  xp        XML node where namespace attribute should be declared (can be same)

test/test_netconf_hello.sh

@@ -106,7 +106,7 @@ new "Netconf snd hello with prefix"
 expecteof "$clixon_netconf -qef $cfg" 0 "<?xml version=\"1.0\" encoding=\"UTF-8\"?><nc:hello xmlns:nc=\"urn:ietf:params:xml:ns:netconf:base:1.0\"><nc:capabilities><nc:capability>urn:ietf:params:netconf:base:1.1</nc:capability></nc:capabilities></nc:hello>]]>]]>" '^$'
 
 new "netconf snd + rcv hello"
-expecteof "$clixon_netconf -f $cfg" 0 "<?xml version=\"1.0\" encoding=\"UTF-8\"?><hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability></capabilities></hello>]]>]]>" "^<hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability><capability>urn:ietf:params:netconf:base:1.0</capability><capability>urn:ietf:params:netconf:capability:yang-library:1.0?revision=2019-01-04&amp;module-set-id=42</capability><capability>urn:ietf:params:netconf:capability:candidate:1.0</capability><capability>urn:ietf:params:netconf:capability:validate:1.1</capability><capability>urn:ietf:params:netconf:capability:startup:1.0</capability><capability>urn:ietf:params:netconf:capability:xpath:1.0</capability><capability>urn:ietf:params:netconf:capability:notification:1.0</capability></capabilities><session-id>[0-9]*</session-id></hello>]]>]]>$" '^$'
+expecteof "$clixon_netconf -f $cfg" 0 "<?xml version=\"1.0\" encoding=\"UTF-8\"?><hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability></capabilities></hello>]]>]]>" "^<hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability><capability>urn:ietf:params:netconf:base:1.0</capability><capability>urn:ietf:params:netconf:capability:yang-library:1.0?revision=2019-01-04&amp;module-set-id=42</capability><capability>urn:ietf:params:netconf:capability:candidate:1.0</capability><capability>urn:ietf:params:netconf:capability:validate:1.1</capability><capability>urn:ietf:params:netconf:capability:startup:1.0</capability><capability>urn:ietf:params:netconf:capability:xpath:1.0</capability><capability>urn:ietf:params:netconf:capability:notification:1.0</capability><capability>urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=explicit</capability></capabilities><session-id>[0-9]*</session-id></hello>]]>]]>$" '^$'
 
 new "Netconf snd hello with extra element"
 expecteof "$clixon_netconf -qef $cfg" 0 "<hello $DEFAULTNS><capabilities><extra-element/><capability>urn:ietf:params:netconf:base:1.1</capability></capabilities></hello>]]>]]>" '^<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="42"><rpc-error><error-type>protocol</error-type><error-tag>unknown-element</error-tag><error-info><bad-element>extra-element</bad-element></error-info><error-severity>error</error-severity><error-message>Unrecognized hello/capabilities element</error-message></rpc-error></rpc-reply>]]>]]>$' '^$'

test/test_netconf_ssh_callhome.sh

@@ -132,7 +132,7 @@ EOF
 new "Start Listener client"
 echo "ssh -s -F $sshcfg -v -i $key -o ProxyUseFdpass=yes -o ProxyCommand=\"clixon_netconf_ssh_callhome_client -a 127.0.0.1\" . netconf"
 #-F $sshcfg
-expectpart "$(ssh -s -F $sshcfg -v -i $key -o ProxyUseFdpass=yes -o ProxyCommand="${clixon_netconf_ssh_callhome_client} -a 127.0.0.1" . netconf < $rpccmd)" 0 "<hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability><capability>urn:ietf:params:netconf:base:1.0</capability><capability>urn:ietf:params:netconf:capability:yang-library:1.0?revision=2019-01-04&amp;module-set-id=42</capability><capability>urn:ietf:params:netconf:capability:candidate:1.0</capability><capability>urn:ietf:params:netconf:capability:validate:1.1</capability><capability>urn:ietf:params:netconf:capability:startup:1.0</capability><capability>urn:ietf:params:netconf:capability:xpath:1.0</capability><capability>urn:ietf:params:netconf:capability:notification:1.0</capability></capabilities><session-id>2</session-id></hello>" "<rpc-reply $DEFAULTNS><data/></rpc-reply>"
+expectpart "$(ssh -s -F $sshcfg -v -i $key -o ProxyUseFdpass=yes -o ProxyCommand="${clixon_netconf_ssh_callhome_client} -a 127.0.0.1" . netconf < $rpccmd)" 0 "<hello $DEFAULTNS><capabilities><capability>urn:ietf:params:netconf:base:1.1</capability><capability>urn:ietf:params:netconf:base:1.0</capability><capability>urn:ietf:params:netconf:capability:yang-library:1.0?revision=2019-01-04&amp;module-set-id=42</capability><capability>urn:ietf:params:netconf:capability:candidate:1.0</capability><capability>urn:ietf:params:netconf:capability:validate:1.1</capability><capability>urn:ietf:params:netconf:capability:startup:1.0</capability><capability>urn:ietf:params:netconf:capability:xpath:1.0</capability><capability>urn:ietf:params:netconf:capability:notification:1.0</capability><capability>urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=explicit</capability></capabilities><session-id>2</session-id></hello>" "<rpc-reply $DEFAULTNS><data/></rpc-reply>"
 
 # Wait 
 wait

test/test_yang_with_defaults.sh

@@ -0,0 +1,336 @@
+#!/usr/bin/env bash
+
+
+# Test of the IETF rfc6243: With-defaults Capability for NETCONF
+#
+# Test cases below follows the RFC.
+#
+
+# Magic line must be first in script (see README.md)
+s="$_" ; . ./lib.sh || if [ "$s" = $0 ]; then exit 0; else return 0; fi
+
+APPNAME=example
+
+cfg=$dir/conf_yang.xml
+fyang=$dir/example-default.yang
+fstate=$dir/state.xml
+
+cat <<EOF > $cfg
+<clixon-config xmlns="http://clicon.org/config">
+  <CLICON_CONFIGFILE>$cfg</CLICON_CONFIGFILE>
+  <CLICON_FEATURE>ietf-netconf:startup</CLICON_FEATURE>
+  <CLICON_MODULE_SET_ID>42</CLICON_MODULE_SET_ID>
+  <CLICON_YANG_DIR>${YANG_INSTALLDIR}</CLICON_YANG_DIR>
+  <CLICON_YANG_MAIN_FILE>$fyang</CLICON_YANG_MAIN_FILE>
+  <CLICON_CLISPEC_DIR>/usr/local/lib/$APPNAME/clispec</CLICON_CLISPEC_DIR>
+  <CLICON_BACKEND_DIR>/usr/local/lib/$APPNAME/backend</CLICON_BACKEND_DIR>
+  <CLICON_BACKEND_REGEXP>example_backend.so$</CLICON_BACKEND_REGEXP>
+  <CLICON_NETCONF_DIR>/usr/local/lib/$APPNAME/netconf</CLICON_NETCONF_DIR>
+  <CLICON_RESTCONF_DIR>/usr/local/lib/$APPNAME/restconf</CLICON_RESTCONF_DIR>
+  <CLICON_CLI_DIR>/usr/local/lib/$APPNAME/cli</CLICON_CLI_DIR>
+  <CLICON_CLI_MODE>$APPNAME</CLICON_CLI_MODE>
+  <CLICON_SOCK>$dir/$APPNAME.sock</CLICON_SOCK>
+  <CLICON_BACKEND_PIDFILE>/usr/local/var/$APPNAME/$APPNAME.pidfile</CLICON_BACKEND_PIDFILE>
+  <CLICON_XMLDB_DIR>$dir</CLICON_XMLDB_DIR>
+  <CLICON_XMLDB_PRETTY>false</CLICON_XMLDB_PRETTY>
+</clixon-config>
+EOF
+
+# A.1.  Example YANG Module
+# The following YANG module defines an example interfaces table to
+# demonstrate how the <with-defaults> parameter behaves for a specific
+# data model.
+cat <<EOF > $fyang
+module example {
+
+     namespace "http://example.com/ns/interfaces";
+
+     prefix exam;
+
+     typedef status-type {
+        description "Interface status";
+        type enumeration {
+          enum ok;
+          enum 'waking up';
+          enum 'not feeling so good';
+          enum 'better check it out';
+          enum 'better call for help';
+        }
+        default ok;
+     }
+
+     container interfaces {
+         description "Example interfaces group";
+
+         list interface {
+           description "Example interface entry";
+           key name;
+
+           leaf name {
+             description
+               "The administrative name of the interface.
+                This is an identifier that is only unique
+                within the scope of this list, and only
+                within a specific server.";
+             type string {
+               length "1 .. max";
+             }
+           }
+
+           leaf mtu {
+             description
+               "The maximum transmission unit (MTU) value assigned to
+                this interface.";
+             type uint32;
+             default 1500;
+           }
+
+           leaf status {
+             description
+               "The current status of this interface.";
+             type status-type;
+             config false;
+           }
+         }
+       }
+     }
+EOF
+
+# A.2.  Example  Data Set
+
+EXAMPLENS="xmlns=\"http://example.com/ns/interfaces\""
+
+XML="<interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu></interface>\
+<interface><name>eth1</name></interface>\
+<interface><name>eth2</name><mtu>9000</mtu></interface>\
+<interface><name>eth3</name><mtu>1500</mtu></interface>\
+</interfaces>"
+
+cat <<EOF > $fstate
+<interfaces xmlns="http://example.com/ns/interfaces">
+<interface><name>eth2</name><status>not feeling so good</status></interface>
+<interface><name>eth3</name><status>waking up</status></interface>
+</interfaces>
+EOF
+
+
+db=startup
+if [ $db = startup ]; then
+    sudo echo "<${DATASTORE_TOP}>$XML</${DATASTORE_TOP}>" > $dir/startup_db
+fi
+if [ $BE -ne 0 ]; then     # Bring your own backend
+    new "kill old backend"
+    sudo clixon_backend -zf $cfg
+    if [ $? -ne 0 ]; then
+	err
+    fi
+    new "start backend -s $db -f $cfg"
+    start_backend  -s $db -f $cfg -- -sS $fstate
+fi
+
+new "wait backend"
+wait_backend
+
+# permission kludges
+new "chmod datastores"
+sudo chmod 666 $dir/running_db
+if [ $? -ne 0 ]; then
+    err1 "chmod $dir/running_db"
+fi
+sudo chmod 666 $dir/startup_db
+if [ $? -ne 0 ]; then
+    err1 "chmod $dir/startup_db"
+fi
+
+new "Checking startup unchanged"
+ret=$(diff $dir/startup_db <(echo "<${DATASTORE_TOP}>$XML</${DATASTORE_TOP}>"))
+if [ $? -ne 0 ]; then
+    err "<${DATASTORE_TOP}>$XML</${DATASTORE_TOP}>" "$ret"
+fi
+
+new "Checking running unchanged"
+ret=$(diff $dir/running_db <(echo -n "<${DATASTORE_TOP}>$XML</${DATASTORE_TOP}>"))
+if [ $? -ne 0 ]; then
+    err "<${DATASTORE_TOP}>$XML</${DATASTORE_TOP}>" "$ret"
+fi
+
+new "rfc4243 4.3.  Capability Identifier"
+expecteof "$clixon_netconf -ef $cfg" 0 "$DEFAULTHELLO" \
+"<capability>urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=explicit</capability>"
+
+new "rfc6243 3.1.  'report-all' Retrieval Mode"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter>\
+<with-defaults xmlns=\"urn:ietf:params:xml:ns:yang:ietf-netconf-with-defaults\">report-all</with-defaults></get></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>1500</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>"
+
+new "rfc6243 3.2.  'trim' Retrieval Mode"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter>\
+<with-defaults xmlns=\"urn:ietf:params:xml:ns:yang:ietf-netconf-with-defaults\">trim</with-defaults></get></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><rpc-error><error-type>application</error-type><error-tag>operation-failed</error-tag>\
+<error-severity>error</error-severity>\
+<error-message>with-defaults retrieval mode \"trim\" is not supported</error-message></rpc-error></rpc-reply>"
+
+new "rfc6243 3.3.  'explicit' Retrieval Mode"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter>\
+<with-defaults xmlns=\"urn:ietf:params:xml:ns:yang:ietf-netconf-with-defaults\">explicit</with-defaults></get></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>"
+
+new "rfc6243 3.4.  'report-all-tagged' Retrieval Mode"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter>\
+<with-defaults xmlns=\"urn:ietf:params:xml:ns:yang:ietf-netconf-with-defaults\">report-all-tagged</with-defaults></get></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><rpc-error><error-type>application</error-type><error-tag>operation-failed</error-tag>\
+<error-severity>error</error-severity>\
+<error-message>with-defaults retrieval mode \"report-all-tagged\" is not supported</error-message></rpc-error></rpc-reply>"
+
+new "rfc6243 2.3.1.  'explicit' Basic Mode Retrieval"
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter></get></rpc>" "" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>1500</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>" ""
+
+new "rfc6243 2.3.3.  'explicit' <edit-config> and <copy-config> Behavior (part 1): create explicit node"
+# A valid 'create' operation attribute for a data node that has
+# been set by a client to its schema default value MUST fail with a
+# 'data-exists' error-tag.
+# (test: try to create mtu=3000 on interface eth3)
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><edit-config><target><candidate/></target><config>\
+<interfaces $EXAMPLENS xmlns:nc=\"urn:ietf:params:xml:ns:netconf:base:1.0\">\
+<interface><name>eth3</name><mtu nc:operation=\"create\">3000</mtu></interface>\
+</interfaces></config><default-operation>none</default-operation> </edit-config></rpc>" "" \
+"<rpc-reply $DEFAULTNS><rpc-error>\
+<error-type>application</error-type>\
+<error-tag>data-exists</error-tag>\
+<error-severity>error</error-severity>\
+<error-message>Data already exists; cannot create new resource</error-message>\
+</rpc-error></rpc-reply>"
+# nothing to commit here, but just to verify
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS ><commit/></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# verify no change
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter></get></rpc>" "" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>1500</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>" ""
+
+new "rfc6243 2.3.3.  'explicit' <edit-config> and <copy-config> Behavior (part 2): create default node"
+# A valid 'create' operation attribute for a
+# data node that has been set by the server to its schema default value
+# MUST succeed.
+# (test: set mtu=3000 on interface eth1)
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><edit-config><target><candidate/></target><config>\
+<interfaces $EXAMPLENS xmlns:nc=\"urn:ietf:params:xml:ns:netconf:base:1.0\">\
+<interface><name>eth1</name><mtu nc:operation=\"create\">3000</mtu></interface>\
+</interfaces></config><default-operation>none</default-operation> </edit-config></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# commit change
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS ><commit/></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# verify that the mtu value has changed
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter></get></rpc>" "" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>3000</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>" ""
+
+new "rfc6243 2.3.3.  'explicit' <edit-config> and <copy-config> Behavior (part 3): delete explicit node"
+#  A valid 'delete' operation attribute for a data node
+#  that has been set by a client to its schema default value MUST
+#  succeed.
+# (test: try to delete mtu on interface eth1)
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><edit-config><target><candidate/></target><config>\
+<interfaces $EXAMPLENS  xmlns:nc=\"urn:ietf:params:xml:ns:netconf:base:1.0\">\
+<interface><name>eth1</name><mtu nc:operation=\"delete\"></mtu></interface>\
+</interfaces></config><default-operation>none</default-operation></edit-config></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# commit delete
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS ><commit/></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# check thet the default mtu vale has been restored
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter></get></rpc>" "" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>1500</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>" ""
+
+new "rfc6243 2.3.3.  'explicit' <edit-config> and <copy-config> Behavior (part 4): delete default node"
+# A valid 'delete' operation attribute for a data node that
+# has been set by the server to its schema default value MUST fail with
+# a 'data-missing' error-tag.
+#(test: try to delete default mtu on interface eth1)
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><edit-config><target><candidate/></target><config>\
+<interfaces $EXAMPLENS  xmlns:nc=\"urn:ietf:params:xml:ns:netconf:base:1.0\">\
+<interface ><name>eth1</name><mtu nc:operation=\"delete\">1500</mtu></interface>\
+</interfaces></config><default-operation>none</default-operation></edit-config></rpc>" \
+"" \
+"<rpc-reply $DEFAULTNS><rpc-error>\
+<error-type>application</error-type>\
+<error-tag>data-missing</error-tag>\
+<error-severity>error</error-severity>\
+<error-message>Data does not exist; cannot delete resource</error-message>\
+</rpc-error></rpc-reply>"
+# nothing to commit
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" "<rpc $DEFAULTNS ><commit/></rpc>" "" "<rpc-reply $DEFAULTNS><ok/></rpc-reply>"
+# verify that the configuration has not changed
+expecteof_netconf "$clixon_netconf -qf $cfg" 0 "$DEFAULTHELLO" \
+"<rpc $DEFAULTNS><get><filter type=\"subtree\"><interfaces $EXAMPLENS/></filter></get></rpc>" "" \
+"<rpc-reply $DEFAULTNS><data><interfaces $EXAMPLENS>\
+<interface><name>eth0</name><mtu>8192</mtu><status>ok</status></interface>\
+<interface><name>eth1</name><mtu>1500</mtu><status>ok</status></interface>\
+<interface><name>eth2</name><mtu>9000</mtu><status>not feeling so good</status></interface>\
+<interface><name>eth3</name><mtu>1500</mtu><status>waking up</status></interface>\
+</interfaces></data></rpc-reply>" ""
+
+
+if [ $BE -ne 0 ]; then     # Bring your own backend
+    new "Kill backend"
+    # Check if premature kill
+    pid=$(pgrep -u root -f clixon_backend)
+    if [ -z "$pid" ]; then
+	err "backend already dead"
+    fi
+    # kill backend
+    stop_backend -f $cfg
+fi
+
+rm -rf $dir
+
+unset ret
+
+new "endtest"
+endtest