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* YANG when statement in conjunction with grouping/uses/augment

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* Several cases were not implemented fully according to RFC 7950
    * Do not extend default values if when statements evaluate to false
    * Do not allow edit-config of nodes if when statements evaluate to false (Sec 8.3.2)
    * If a key leaf is defined in a grouping that is used in a list, the "uses" statement MUST NOT have a "when" statement. (See 7.21.5)
  * See [yang uses's substatement when has no effect #218](https://github.com/clicon/clixon/issues/2$
This commit is contained in:
Olof hagsand 2021-05-12 08:42:15 +02:00
parent 5c7498ee40
commit 783b0a4857
20 changed files with 577 additions and 164 deletions
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16
lib/src/clixon_xml_map.c
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@ -1142,6 +1142,8 @@ xml_default1(yang_stmt *yt,
cxobj *xc;
int top=0; /* Top symbol (set default namespace) */
int create = 0;
char *xpath;
int nr;
if (xt == NULL){ /* No xml */
clicon_err(OE_XML, EINVAL, "No XML argument");
@ -1162,6 +1164,13 @@ xml_default1(yang_stmt *yt,
switch (yang_keyword_get(yc)){
case Y_LEAF:
if (!cv_flag(yang_cv_get(yc), V_UNSET)){ /* Default value exists */
/* Check when statement from uses or augment */
if ((xpath = yang_when_xpath_get(yc)) != NULL){
if ((nr = xpath_vec_bool(xt, yang_when_nsc_get(yc), "%s", xpath)) < 0)
goto done;
if (nr == 0)
break; /* Do not create default if xpath fails */
}
if (xml_find_type(xt, NULL, yang_argument_get(yc), CX_ELMNT) == NULL){
/* No such child exist, create this leaf */
if (xml_default_create(yc, xt, top) < 0)
@ -1172,6 +1181,13 @@ xml_default1(yang_stmt *yt,
break;
case Y_CONTAINER:
if (yang_find(yc, Y_PRESENCE, NULL) == NULL){
/* Check when statement from uses or augment */
if ((xpath = yang_when_xpath_get(yc)) != NULL){
if ((nr = xpath_vec_bool(xt, yang_when_nsc_get(yc), "%s", xpath)) < 0)
goto done;
if (nr == 0)
break; /* Do not create default if xpath fails */
}
/* If this is non-presence, (and it does not exist in xt) call
* recursively and create nodes if any default value exist first.
* Then continue and populate?