Line data    Source code

       1             : /*
       2             :  * Copyright (C) 2018  NetDEF, Inc.
       3             :  *                     Renato Westphal
       4             :  *
       5             :  * This program is free software; you can redistribute it and/or modify it
       6             :  * under the terms of the GNU General Public License as published by the Free
       7             :  * Software Foundation; either version 2 of the License, or (at your option)
       8             :  * any later version.
       9             :  *
      10             :  * This program is distributed in the hope that it will be useful, but WITHOUT
      11             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             :  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
      13             :  * more details.
      14             :  *
      15             :  * You should have received a copy of the GNU General Public License along
      16             :  * with this program; see the file COPYING; if not, write to the Free Software
      17             :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
      18             :  */
      19             : 
      20             : #ifndef _FRR_YANG_TRANSLATOR_H_
      21             : #define _FRR_YANG_TRANSLATOR_H_
      22             : 
      23             : #ifdef __cplusplus
      24             : extern "C" {
      25             : #endif
      26             : 
      27             : #define YANG_TRANSLATE_TO_NATIVE 0
      28             : #define YANG_TRANSLATE_FROM_NATIVE 1
      29             : #define YANG_TRANSLATE_MAX 2
      30             : 
      31             : struct yang_tmodule {
      32             :         const struct lys_module *module;
      33             :         const struct lys_module *deviations;
      34             :         uint32_t nodes_before_deviations;
      35             :         uint32_t nodes_after_deviations;
      36             :         double coverage;
      37             : };
      38             : 
      39             : struct yang_translator {
      40             :         RB_ENTRY(yang_translator) entry;
      41             :         char family[32];
      42             :         struct ly_ctx *ly_ctx;
      43             :         struct list *modules;
      44             :         struct hash *mappings[YANG_TRANSLATE_MAX];
      45             : };
      46             : RB_HEAD(yang_translators, yang_translator);
      47          24 : RB_PROTOTYPE(yang_translators, yang_translator, entry, yang_translator_compare);
      48             : 
      49             : enum yang_translate_result {
      50             :         YANG_TRANSLATE_SUCCESS,
      51             :         YANG_TRANSLATE_NOTFOUND,
      52             :         YANG_TRANSLATE_FAILURE,
      53             : };
      54             : 
      55             : /* Tree of all loaded YANG module translators. */
      56             : extern struct yang_translators yang_translators;
      57             : 
      58             : /*
      59             :  * Load a YANG module translator from a JSON file.
      60             :  *
      61             :  * path
      62             :  *    Absolute path to the module translator file.
      63             :  *
      64             :  * Returns:
      65             :  *    Pointer to newly created YANG module translator, or NULL in the case of an
      66             :  *    error.
      67             :  */
      68             : extern struct yang_translator *yang_translator_load(const char *path);
      69             : 
      70             : /*
      71             :  * Unload a YANG module translator.
      72             :  *
      73             :  * translator
      74             :  *    Pointer to the YANG module translator.
      75             :  */
      76             : extern void yang_translator_unload(struct yang_translator *translator);
      77             : 
      78             : /*
      79             :  * Find a YANG module translator by its family name.
      80             :  *
      81             :  * family
      82             :  *    Family of the YANG module translator (e.g. ietf, openconfig).
      83             :  *
      84             :  * Returns:
      85             :  *    Pointer to the YANG module translator if found, NULL otherwise.
      86             :  */
      87             : extern struct yang_translator *yang_translator_find(const char *family);
      88             : 
      89             : /*
      90             :  * Translate an XPath expression.
      91             :  *
      92             :  * translator
      93             :  *    Pointer to YANG module translator.
      94             :  *
      95             :  * dir
      96             :  *    Direction of the translation (either YANG_TRANSLATE_TO_NATIVE or
      97             :  *    YANG_TRANSLATE_FROM_NATIVE).
      98             :  *
      99             :  * xpath
     100             :  *    Pointer to previously allocated buffer containing the xpath expression to
     101             :  *    be translated.
     102             :  *
     103             :  * xpath_len
     104             :  *    Size of the xpath buffer.
     105             :  *
     106             :  * Returns:
     107             :  *    - YANG_TRANSLATE_SUCCESS on success.
     108             :  *    - YANG_TRANSLATE_NOTFOUND when there's no available mapping to perform
     109             :  *      the translation.
     110             :  *    - YANG_TRANSLATE_FAILURE when an error occurred during the translation.
     111             :  */
     112             : extern enum yang_translate_result
     113             : yang_translate_xpath(const struct yang_translator *translator, int dir,
     114             :                      char *xpath, size_t xpath_len);
     115             : 
     116             : /*
     117             :  * Translate an entire libyang data node.
     118             :  *
     119             :  * translator
     120             :  *    Pointer to YANG module translator.
     121             :  *
     122             :  * dir
     123             :  *    Direction of the translation (either YANG_TRANSLATE_TO_NATIVE or
     124             :  *    YANG_TRANSLATE_FROM_NATIVE).
     125             :  *
     126             :  * dnode
     127             :  *    libyang schema node we want to translate.
     128             :  *
     129             :  * Returns:
     130             :  *    - YANG_TRANSLATE_SUCCESS on success.
     131             :  *    - YANG_TRANSLATE_FAILURE when an error occurred during the translation.
     132             :  */
     133             : extern int yang_translate_dnode(const struct yang_translator *translator,
     134             :                                 int dir, struct lyd_node **dnode);
     135             : 
     136             : /*
     137             :  * Initialize the YANG module translator subsystem. Should be called only once
     138             :  * during the daemon initialization process.
     139             :  */
     140             : extern void yang_translator_init(void);
     141             : 
     142             : /*
     143             :  * Finish the YANG module translator subsystem gracefully. Should be called only
     144             :  * when the daemon is exiting.
     145             :  */
     146             : extern void yang_translator_terminate(void);
     147             : 
     148             : #ifdef __cplusplus
     149             : }
     150             : #endif
     151             : 
     152             : #endif /* _FRR_YANG_TRANSLATOR_H_ */