new file: clixon_xml_bind.[ch]
This commit is contained in:
Olof hagsand
parent
ac5637a46a
commit
58c36decef
2 changed files with 605 additions and 0 deletions
51
lib/clixon/clixon_xml_bind.h
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51
lib/clixon/clixon_xml_bind.h
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@ -0,0 +1,51 @@
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/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
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Copyright (C) 2017-2019 Olof Hagsand
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Copyright (C) 2020 Olof Hagsand and Rubicon Communications, LLC
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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||||
in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
|
||||
the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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*
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* Bind YANG to XML nodes
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*/
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#ifndef _CLIXON_XML_BIND_H_
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#define _CLIXON_XML_BIND_H_
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/*
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* Prototypes
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*/
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int xml_bind_yang_rpc(cxobj *xrpc, yang_stmt *yspec, cxobj **xerr);
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int xml_bind_yang_rpc_reply(cxobj *xrpc, char *name, yang_stmt *yspec, cxobj **xerr);
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int xml_bind_yang0(cxobj *xt, yang_bind yb, yang_stmt *yspec, cxobj **xerr);
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int xml_bind_yang(cxobj *xt, yang_bind yb, yang_stmt *yspec, cxobj **xerr);
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#endif /* _CLIXON_XML_BIND_H_ */
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554
lib/src/clixon_xml_bind.c
Normal file
554
lib/src/clixon_xml_bind.c
Normal file
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@ -0,0 +1,554 @@
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/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
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Copyright (C) 2017-2019 Olof Hagsand
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Copyright (C) 2020 Olof Hagsand and Rubicon Communications, LLC
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
|
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
|
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indicate your decision by deleting the provisions above and replace them with
|
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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*
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* Translation / mapping code between formats
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*/
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#ifdef HAVE_CONFIG_H
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#include "clixon_config.h" /* generated by config & autoconf */
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <arpa/inet.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clicon */
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#include "clixon_string.h"
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#include "clixon_queue.h"
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#include "clixon_hash.h"
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#include "clixon_handle.h"
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#include "clixon_string.h"
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#include "clixon_yang.h"
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#include "clixon_xml.h"
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#include "clixon_options.h"
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#include "clixon_data.h"
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#include "clixon_yang_module.h"
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#include "clixon_plugin.h"
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#include "clixon_xml_nsctx.h"
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#include "clixon_xpath_ctx.h"
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#include "clixon_xpath.h"
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#include "clixon_log.h"
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#include "clixon_err.h"
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#include "clixon_netconf_lib.h"
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#include "clixon_xml_sort.h"
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#include "clixon_yang_type.h"
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#include "clixon_xml_bind.h"
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/*! After yang binding, bodies of containers and lists are stripped from XML bodies
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* May apply to other nodes?
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*/
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static int
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strip_whitespace(cxobj *xt)
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{
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yang_stmt *yt;
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enum rfc_6020 keyword;
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cxobj *xc;
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if ((yt = xml_spec(xt)) != NULL){
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keyword = yang_keyword_get(yt);
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if (keyword == Y_LIST || keyword == Y_CONTAINER){
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xc = NULL;
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while ((xc = xml_find_type(xt, NULL, "body", CX_BODY)) != NULL)
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xml_purge(xc);
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}
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}
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return 0;
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}
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/*! Associate XML node x with x:s parents yang:s matching child
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*
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* @param[in] xt XML tree node
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* @param[out] xerr Reason for failure, or NULL
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* @retval 1 OK Yang assignment made
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* @retval 2 OK Yang assignment not made because yang parent is anyxml or anydata
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* @retval 0 Yang assigment not made and xerr set
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* @retval -1 Error
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* @note retval = 2 is special
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* @see populate_self_top
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*/
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static int
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populate_self_parent(cxobj *xt,
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cxobj **xerr)
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{
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int retval = -1;
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yang_stmt *y = NULL; /* yang node */
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yang_stmt *yparent; /* yang parent */
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cxobj *xp = NULL; /* xml parent */
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char *name;
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char *ns = NULL; /* XML namespace of xt */
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char *nsy = NULL; /* Yang namespace of xt */
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cbuf *cb = NULL;
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xp = xml_parent(xt);
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name = xml_name(xt);
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if (xp == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Missing parent") < 0)
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goto done;
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goto fail;
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}
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if ((yparent = xml_spec(xp)) == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Missing parent yang node") < 0)
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goto done;
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goto fail;
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}
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if (yang_keyword_get(yparent) == Y_ANYXML || yang_keyword_get(yparent) == Y_ANYDATA){
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retval = 2;
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goto done;
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}
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if (xml2ns(xt, xml_prefix(xt), &ns) < 0)
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goto done;
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if ((y = yang_find_datanode(yparent, name)) == NULL){
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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cprintf(cb, "Failed to find YANG spec of XML node: %s", name);
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cprintf(cb, " with parent: %s", xml_name(xp));
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if (ns)
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cprintf(cb, " in namespace: %s", ns);
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, cbuf_get(cb)) < 0)
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goto done;
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goto fail;
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}
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nsy = yang_find_mynamespace(y);
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if (ns == NULL || nsy == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Missing namespace") < 0)
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goto done;
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goto fail;
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}
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/* Assign spec only if namespaces match */
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if (strcmp(ns, nsy) != 0){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Namespace mismatch") < 0)
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goto done;
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goto fail;
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}
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xml_spec_set(xt, y);
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#ifdef XML_EXPLICIT_INDEX
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if (xml_search_index_p(xt))
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xml_search_child_insert(xp, xt);
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#endif
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retval = 1;
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done:
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return retval;
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fail:
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retval = 0;
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goto done;
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}
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/*! Associate XML node x with yang spec y by going through all top-level modules and finding match
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*
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* @param[in] xt XML tree node
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* @param[in] yspec Yang spec
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* @param[out] xerr Reason for failure, or NULL
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* @retval 1 OK yang assignment made
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* @retval 0 yang assigment not made and xerr set
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* @retval -1 Error
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* @see populate_self_parent
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*/
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static int
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populate_self_top(cxobj *xt,
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yang_stmt *yspec,
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cxobj **xerr)
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{
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int retval = -1;
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yang_stmt *y = NULL; /* yang node */
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yang_stmt *ymod; /* yang module */
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char *name;
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char *ns = NULL; /* XML namespace of xt */
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char *nsy = NULL; /* Yang namespace of xt */
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cbuf *cb = NULL;
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cxobj *xp;
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name = xml_name(xt);
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if (yspec == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Missing yang spec") < 0)
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goto done;
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goto fail;
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}
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if (ys_module_by_xml(yspec, xt, &ymod) < 0)
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goto done;
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/* ymod is "real" module, name may belong to included submodule */
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if (ymod == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "No such yang module") < 0)
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goto done;
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goto fail;
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}
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if (xml2ns(xt, xml_prefix(xt), &ns) < 0)
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goto done;
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if ((y = yang_find_schemanode(ymod, name)) == NULL){ /* also rpc */
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, errno, "cbuf_new");
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goto done;
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}
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cprintf(cb, "Failed to find YANG spec of XML node: %s", name);
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if ((xp = xml_parent(xt)) != NULL)
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cprintf(cb, " with parent: %s", xml_name(xp));
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if (ns)
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cprintf(cb, " in namespace: %s", ns);
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, cbuf_get(cb)) < 0)
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goto done;
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goto fail;
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}
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nsy = yang_find_mynamespace(y);
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if (ns == NULL || nsy == NULL){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Missing namespace") < 0)
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goto done;
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goto fail;
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}
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/* Assign spec only if namespaces match */
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if (strcmp(ns, nsy) != 0){
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if (xerr &&
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netconf_bad_element_xml(xerr, "application", name, "Namespace mismatch") < 0)
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goto done;
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goto fail;
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}
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xml_spec_set(xt, y);
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retval = 1;
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done:
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if (cb)
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cbuf_free(cb);
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return retval;
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fail:
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retval = 0;
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goto done;
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}
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/*! Find yang spec association of tree of XML nodes
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*
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* Populate xt:s children as top-level symbols
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* This may be unnecessary if yspec is set on manual creation. Also note that for incoming or
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* outgoing RPC need specialized function. maybe it can be built into the same function, but
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* you dont know whether it is input or output rpc.
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* @param[in] xt XML tree node
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* @param[in] yspec Yang spec
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* @param[out] xerr Reason for failure, or NULL
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* @retval 1 OK yang assignment made
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* @retval 0 Partial or no yang assigment made (at least one failed) and xerr set
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* @retval -1 Error
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* @code
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* if (xml_bind_yang(x, YB_MODULE, yspec, NULL) < 0)
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* err;
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* @endcode
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* @note For subs to anyxml nodes will not have spec set
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* There are several functions in the API family
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* @see xml_bind_yang_rpc for incoming rpc
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* @see xml_bind_yang0 If the calling xml object should also be populated
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*/
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int
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xml_bind_yang(cxobj *xt,
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yang_bind yb,
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yang_stmt *yspec,
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cxobj **xerr)
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{
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int retval = -1;
|
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cxobj *xc; /* xml child */
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int ret;
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int failed = 0; /* we continue loop after failure, should we stop at fail?`*/
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strip_whitespace(xt);
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xc = NULL; /* Apply on children */
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while ((xc = xml_child_each(xt, xc, CX_ELMNT)) != NULL) {
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if ((ret = xml_bind_yang0(xc, yb, yspec, xerr)) < 0)
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goto done;
|
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if (ret == 0)
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failed++;
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}
|
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if (failed)
|
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goto fail;
|
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retval = 1;
|
||||
done:
|
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return retval;
|
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fail:
|
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retval = 0;
|
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goto done;
|
||||
}
|
||||
|
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/*! Find yang spec association of tree of XML nodes
|
||||
*
|
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* @param[in] xt XML tree node
|
||||
* @param[in] yb How to bind yang to XML top-level when parsing
|
||||
* @param[in] yspec Yang spec
|
||||
* @param[out] xerr Reason for failure, or NULL
|
||||
* @retval 1 OK yang assignment made
|
||||
* @retval 0 Partial or no yang assigment made (at least one failed) and xerr set
|
||||
* @retval -1 Error
|
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* Populate xt as top-level node
|
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*/
|
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int
|
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xml_bind_yang0(cxobj *xt,
|
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yang_bind yb,
|
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yang_stmt *yspec,
|
||||
cxobj **xerr)
|
||||
{
|
||||
int retval = -1;
|
||||
cxobj *xc; /* xml child */
|
||||
int ret;
|
||||
int failed = 0; /* we continue loop after failure, should we stop at fail?`*/
|
||||
|
||||
switch (yb){
|
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case YB_MODULE:
|
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if ((ret = populate_self_top(xt, yspec, xerr)) < 0)
|
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goto done;
|
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break;
|
||||
case YB_PARENT:
|
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if ((ret = populate_self_parent(xt, xerr)) < 0)
|
||||
goto done;
|
||||
break;
|
||||
default:
|
||||
clicon_err(OE_XML, EINVAL, "Invalid yang binding: %d", yb);
|
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goto done;
|
||||
break;
|
||||
}
|
||||
if (ret == 0)
|
||||
goto fail;
|
||||
else if (ret == 2) /* ret=2 for anyxml from parent^ */
|
||||
goto ok;
|
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strip_whitespace(xt);
|
||||
xc = NULL; /* Apply on children */
|
||||
while ((xc = xml_child_each(xt, xc, CX_ELMNT)) != NULL) {
|
||||
if ((ret = xml_bind_yang0(xc, YB_PARENT, yspec, xerr)) < 0)
|
||||
goto done;
|
||||
if (ret == 0)
|
||||
failed++;
|
||||
}
|
||||
if (failed)
|
||||
goto fail;
|
||||
ok:
|
||||
retval = 1;
|
||||
done:
|
||||
return retval;
|
||||
fail:
|
||||
retval = 0;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/*! Find yang spec association of XML node for incoming RPC starting with <rpc>
|
||||
*
|
||||
* Incoming RPC has an "input" structure that is not taken care of by xml_bind_yang
|
||||
* @param[in] xrpc XML rpc node
|
||||
* @param[in] yspec Yang spec
|
||||
* @param[out] xerr Reason for failure, or NULL
|
||||
* @retval 1 OK yang assignment made
|
||||
* @retval 0 Partial or no yang assigment made (at least one failed) and xerr set
|
||||
* @retval -1 Error
|
||||
* The
|
||||
* @code
|
||||
* if (xml_bind_yang_rpc(h, x, NULL) < 0)
|
||||
* err;
|
||||
* @endcode
|
||||
* @see xml_bind_yang For other generic cases
|
||||
* @see xml_bind_yang_rpc_reply
|
||||
*/
|
||||
int
|
||||
xml_bind_yang_rpc(cxobj *xrpc,
|
||||
yang_stmt *yspec,
|
||||
cxobj **xerr)
|
||||
{
|
||||
int retval = -1;
|
||||
yang_stmt *yrpc = NULL; /* yang node */
|
||||
yang_stmt *ymod=NULL; /* yang module */
|
||||
yang_stmt *yi = NULL; /* input */
|
||||
cxobj *x;
|
||||
int ret;
|
||||
char *opname; /* top-level netconf operation */
|
||||
char *rpcname; /* RPC name */
|
||||
char *name;
|
||||
cbuf *cb = NULL;
|
||||
cxobj *xc;
|
||||
|
||||
opname = xml_name(xrpc);
|
||||
if ((strcmp(opname, "hello")) == 0) /* Hello: dont bind, dont appear in any yang spec */
|
||||
goto ok;
|
||||
else if ((strcmp(opname, "notification")) == 0)
|
||||
goto ok;
|
||||
else if ((strcmp(opname, "rpc")) == 0)
|
||||
; /* continue */
|
||||
else { /* Notify, rpc-reply? */
|
||||
if (xerr &&
|
||||
netconf_unknown_element_xml(xerr, "protocol", opname, "Unrecognized netconf operation") < 0)
|
||||
goto done;
|
||||
goto fail;
|
||||
}
|
||||
x = NULL;
|
||||
while ((x = xml_child_each(xrpc, x, CX_ELMNT)) != NULL) {
|
||||
rpcname = xml_name(x);
|
||||
if (ys_module_by_xml(yspec, x, &ymod) < 0)
|
||||
goto done;
|
||||
#if 1
|
||||
assert(ymod);
|
||||
#else
|
||||
if (ymod == NULL){
|
||||
if ((cberr = cbuf_new()) == NULL){
|
||||
clicon_err(OE_UNIX, errno, "cbuf_new");
|
||||
goto done;
|
||||
}
|
||||
/* more here */
|
||||
goto fail;
|
||||
}
|
||||
#endif
|
||||
if ((yrpc = yang_find(ymod, Y_RPC, rpcname)) == NULL){
|
||||
if (xerr &&
|
||||
netconf_unknown_element_xml(xerr, "application", rpcname, "Unrecognized RPC") < 0)
|
||||
goto done;
|
||||
goto fail;
|
||||
}
|
||||
xml_spec_set(x, yrpc); /* required for validate */
|
||||
if ((yi = yang_find(yrpc, Y_INPUT, NULL)) == NULL){
|
||||
/* If no yang input spec but RPC has elements, return unknown element */
|
||||
if (xml_child_nr_type(x, CX_ELMNT) != 0){
|
||||
xc = xml_child_i_type(x, 0, CX_ELMNT); /* Pick first */
|
||||
name = xml_name(xc);
|
||||
if ((cb = cbuf_new()) == NULL){
|
||||
clicon_err(OE_UNIX, errno, "cbuf_new");
|
||||
goto done;
|
||||
}
|
||||
cprintf(cb, "Unrecognized parameter: %s in rpc: %s", name, rpcname);
|
||||
if (xerr &&
|
||||
netconf_unknown_element_xml(xerr, "application", name, cbuf_get(cb)) < 0)
|
||||
goto done;
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
else{
|
||||
/* xml_bind_yang need to have parent with yang spec for
|
||||
* recursive population to work. Therefore, assign input yang
|
||||
* to rpc level although not 100% intuitive */
|
||||
xml_spec_set(x, yi);
|
||||
if ((ret = xml_bind_yang(x, YB_PARENT, NULL, xerr)) < 0)
|
||||
goto done;
|
||||
if (ret == 0)
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
ok:
|
||||
retval = 1;
|
||||
done:
|
||||
if (cb)
|
||||
cbuf_free(cb);
|
||||
return retval;
|
||||
fail:
|
||||
retval = 0;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/*! Find yang spec association of XML node for outgoing RPC starting with <rpc-reply>
|
||||
*
|
||||
* Incoming RPC has an "input" structure that is not taken care of by xml_bind_yang
|
||||
* @param[in] xrpc XML rpc node
|
||||
* @param[in] name Name of RPC (not seen in output/reply)
|
||||
* @param[in] yspec Yang spec
|
||||
* @param[out] xerr Reason for failure, or NULL
|
||||
* @retval 1 OK yang assignment made
|
||||
* @retval 0 Partial or no yang assigment made (at least one failed) and xerr set
|
||||
* @retval -1 Error
|
||||
*
|
||||
* @code
|
||||
* if (xml_bind_yang_rpc_reply(x, "get-config", yspec, name) < 0)
|
||||
* err;
|
||||
* @endcode
|
||||
* @see xml_bind_yang For other generic cases
|
||||
*/
|
||||
int
|
||||
xml_bind_yang_rpc_reply(cxobj *xrpc,
|
||||
char *name,
|
||||
yang_stmt *yspec,
|
||||
cxobj **xerr)
|
||||
{
|
||||
int retval = -1;
|
||||
yang_stmt *yrpc = NULL; /* yang node */
|
||||
yang_stmt *ymod=NULL; /* yang module */
|
||||
yang_stmt *yo = NULL; /* output */
|
||||
cxobj *x;
|
||||
int ret;
|
||||
|
||||
if (strcmp(xml_name(xrpc), "rpc-reply")){
|
||||
clicon_err(OE_UNIX, EINVAL, "rpc-reply expected");
|
||||
goto done;
|
||||
}
|
||||
x = NULL;
|
||||
while ((x = xml_child_each(xrpc, x, CX_ELMNT)) != NULL) {
|
||||
if (ys_module_by_xml(yspec, x, &ymod) < 0)
|
||||
goto done;
|
||||
if (ymod == NULL)
|
||||
continue;
|
||||
if ((yrpc = yang_find(ymod, Y_RPC, name)) == NULL)
|
||||
continue;
|
||||
// xml_spec_set(xrpc, yrpc);
|
||||
if ((yo = yang_find(yrpc, Y_OUTPUT, NULL)) == NULL)
|
||||
continue;
|
||||
/* xml_bind_yang need to have parent with yang spec for
|
||||
* recursive population to work. Therefore, assign input yang
|
||||
* to rpc level although not 100% intuitive */
|
||||
break;
|
||||
}
|
||||
if (yo != NULL){
|
||||
xml_spec_set(xrpc, yo);
|
||||
if ((ret = xml_bind_yang(xrpc, YB_MODULE, yspec, xerr)) < 0)
|
||||
goto done;
|
||||
if (ret == 0)
|
||||
goto fail;
|
||||
}
|
||||
retval = 1;
|
||||
done:
|
||||
return retval;
|
||||
fail:
|
||||
retval = 0;
|
||||
goto done;
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue