RFC 7895:
* Changed Netconf hello to single capabilty urn:ietf:params:netconf:capability:yang-library:1.0 according to YANG 1.1 RFC7950 Sec 5.6.4. * Set by option: CLICON_MODULE_LIBRARY_RFC7895 - enabled by default * Option CLICON_MODULE_SET_ID is set and changed when modules change.
This commit is contained in:
Olof hagsand
parent
507e03742d
commit
65c44b41e8
16 changed files with 385 additions and 122 deletions
240
lib/src/clixon_yang_module.c
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240
lib/src/clixon_yang_module.c
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/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2018 Olof Hagsand and Benny Holmgren
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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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* Yang module and feature handling
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* @see https://tools.ietf.org/html/rfc7895
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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 <errno.h>
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#include <limits.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <regex.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <assert.h>
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#include <sys/stat.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_log.h"
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#include "clixon_err.h"
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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_file.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_netconf_lib.h"
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#include "clixon_yang_module.h"
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/*! Init the Yang module library
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*
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* Load RFC7895 yang spec, module-set-id, etc.
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* @param[in] h Clicon handle
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* @note CLIXON_DATADIR is hardcoded
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*/
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int
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yang_modules_init(clicon_handle h)
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{
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int retval = -1;
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yang_spec *yspec;
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yspec = clicon_dbspec_yang(h);
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if (!clicon_option_bool(h, "CLICON_MODULE_LIBRARY_RFC7895"))
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goto ok;
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/* Ensure module-set-id is set */
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if (!clicon_option_exists(h, "CLICON_MODULE_SET_ID")){
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clicon_err(OE_CFG, ENOENT, "CLICON_MODULE_SET_ID must be defined when CLICON_MODULE_LIBRARY_RFC7895 is enabled");
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goto done;
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}
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/* Ensure revision exists is set */
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if (yang_spec_parse_module(h, "ietf-yang-library", CLIXON_DATADIR, NULL, yspec)< 0)
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goto done;
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/* Find revision */
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if (yang_modules_revision(h) == NULL){
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clicon_err(OE_CFG, ENOENT, "Yang client library yang spec has no revision");
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goto done;
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}
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ok:
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retval = 0;
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done:
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return retval;
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}
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/*! Return RFC7895 revision (if parsed)
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* @param[in] h Clicon handle
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* @retval revision String (dont free)
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* @retval NULL Error: RFC7895 not loaded or revision not found
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*/
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char *
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yang_modules_revision(clicon_handle h)
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{
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yang_spec *yspec;
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yang_stmt *ymod;
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yang_stmt *yrev;
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char *revision = NULL;
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yspec = clicon_dbspec_yang(h);
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if ((ymod = yang_find((yang_node*)yspec, Y_MODULE, "ietf-yang-library")) != NULL){
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if ((yrev = yang_find((yang_node*)ymod, Y_REVISION, NULL)) != NULL){
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revision = yrev->ys_argument;
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}
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}
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return revision;
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}
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/*! Get modules state according to RFC 7895
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* @param[in] h Clicon handle
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* @param[in] yspec Yang spec
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* @param[in,out] xret Existing XML tree, merge x into this
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* @retval -1 Error (fatal)
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* @retval 0 OK
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* @retval 1 Statedata callback failed
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* @notes NYI: schema, deviation
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x +--ro modules-state
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x +--ro module-set-id string
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x +--ro module* [name revision]
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x +--ro name yang:yang-identifier
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x +--ro revision union
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+--ro schema? inet:uri
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x +--ro namespace inet:uri
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+--ro feature* yang:yang-identifier
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+--ro deviation* [name revision]
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| +--ro name yang:yang-identifier
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| +--ro revision union
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+--ro conformance-type enumeration
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+--ro submodule* [name revision]
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+--ro name yang:yang-identifier
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+--ro revision union
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+--ro schema? inet:uri
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*/
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int
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yang_modules_state_get(clicon_handle h,
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yang_spec *yspec,
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cxobj **xret)
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{
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int retval = -1;
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cxobj *x = NULL;
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cbuf *cb = NULL;
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yang_stmt *ylib = NULL; /* ietf-yang-library */
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yang_stmt *yns = NULL; /* namespace */
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yang_stmt *ymod; /* generic module */
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yang_stmt *ys;
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yang_stmt *yc;
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char *module_set_id;
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char *module = "ietf-yang-library";
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module_set_id = clicon_option_str(h, "CLICON_MODULE_SET_ID");
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if ((ylib = yang_find((yang_node*)yspec, Y_MODULE, module)) == NULL){
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clicon_err(OE_YANG, 0, "%s not found", module);
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goto done;
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}
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if ((yns = yang_find((yang_node*)ylib, Y_NAMESPACE, NULL)) == NULL){
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clicon_err(OE_YANG, 0, "%s yang namespace not found", module);
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goto done;
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}
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if ((cb = cbuf_new()) == NULL){
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clicon_err(OE_UNIX, 0, "clicon buffer");
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goto done;
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}
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cprintf(cb,"<modules-state xmlns=\"%s\">", yns->ys_argument);
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cprintf(cb,"<module-set-id>%s</module-set-id>", module_set_id);
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ymod = NULL;
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while ((ymod = yn_each((yang_node*)yspec, ymod)) != NULL) {
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if (ymod->ys_keyword != Y_MODULE)
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continue;
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cprintf(cb,"<module>");
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cprintf(cb,"<name>%s</name>", ymod->ys_argument);
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if ((ys = yang_find((yang_node*)ymod, Y_REVISION, NULL)) != NULL)
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cprintf(cb,"<revision>%s</revision>", ys->ys_argument);
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else
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cprintf(cb,"<revision></revision>");
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if ((ys = yang_find((yang_node*)ymod, Y_NAMESPACE, NULL)) != NULL)
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cprintf(cb,"<namespace>%s</namespace>", ys->ys_argument);
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else
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cprintf(cb,"<namespace></namespace>");
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yc = NULL;
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while ((yc = yn_each((yang_node*)ymod, yc)) != NULL) {
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switch(yc->ys_keyword){
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case Y_FEATURE:
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if (yc->ys_cv && cv_bool_get(yc->ys_cv))
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cprintf(cb,"<feature>%s</feature>", yc->ys_argument);
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break;
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case Y_SUBMODULE:
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cprintf(cb,"<submodule>");
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cprintf(cb,"<name>%s</name>", yc->ys_argument);
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if ((ys = yang_find((yang_node*)yc, Y_REVISION, NULL)) != NULL)
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cprintf(cb,"<revision>%s</revision>", ys->ys_argument);
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else
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cprintf(cb,"<revision></revision>");
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cprintf(cb,"</submodule>");
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break;
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default:
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break;
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}
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}
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cprintf(cb,"</module>");
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}
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cprintf(cb,"</modules-state>");
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if (xml_parse_string(cbuf_get(cb), yspec, &x) < 0){
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if (netconf_operation_failed_xml(xret, "protocol", clicon_err_reason)< 0)
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goto done;
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retval = 1;
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goto done;
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}
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retval = netconf_trymerge(x, yspec, xret);
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done:
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if (cb)
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cbuf_free(cb);
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if (x)
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xml_free(x);
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return retval;
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}
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