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Sanity check of mandatory key statement for Yang LISTs.

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* If fails, exit with error message, eg: `Yang error: Sanity check failed: LIST vsDataContainer lacks key statement which MUST be present (See RFC 7950 Sec 7.8.2)`
  * Can be disabled by setting `CLICON_CLICON_YANG_LIST_CHECK` to `false`
This commit is contained in:
Olof hagsand 2020-03-09 15:48:33 +01:00
parent 237be5b819
commit 0e94937ccf
11 changed files with 138 additions and 39 deletions
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74
lib/src/clixon_yang_parse_lib.c
View file

@ -835,7 +835,7 @@ yang_parse_recurse(clicon_handle h,
/*!
* @param[in] ys Yang statement
* @param[in] dummy Necessary for called in yang_apply
* @see yang_apply_fn
* @see yang_applyfn_t
*/
static int
ys_schemanode_check(yang_stmt *ys,
@ -906,6 +906,69 @@ ys_schemanode_check(yang_stmt *ys,
return retval;
}
/*! Check lists: non-config lists MUST have keys
* @param[in] h Clicon handle
* @param[in] ys Yang statement
* Verify the following rule:
* RFC 7950 7.8.2: The "key" statement, which MUST be present if the list represents
* configuration and MAY be present otherwise
* Unless CLICON_YANG_LIST_CHECK is false
* OR it is the "errors" rule of the ietf-restconf spec which seems to be a special case.
*/
static int
ys_list_check(clicon_handle h,
yang_stmt *ys)
{
int retval = -1;
yang_stmt *ymod;
yang_stmt *yc = NULL;
enum rfc_6020 keyw;
/* This node has config false */
if (yang_config(ys) == 0)
return 0;
keyw = yang_keyword_get(ys);
/* Check if list and if keys do not exist */
if (keyw == Y_LIST &&
yang_find(ys, Y_KEY, NULL) == 0){
ymod = ys_module(ys);
#if 1
/* Except restconf error extension from sanity check, dont know why it has no keys */
if (strcmp(yang_find_mynamespace(ys),"urn:ietf:params:xml:ns:yang:ietf-restconf")==0 &&
strcmp(yang_argument_get(ys),"error") == 0)
;
else
#endif
{
if (clicon_option_bool(h, "CLICON_YANG_LIST_CHECK")){
clicon_log(LOG_ERR, "Error: LIST \"%s\" in module \"%s\" lacks key statement which MUST be present (See RFC 7950 Sec 7.8.2)",
yang_argument_get(ys),
yang_argument_get(ymod)
);
goto done;
}
else
clicon_log(LOG_WARNING, "Warning: LIST \"%s\" in module \"%s\" lacks key statement which MUST be present (See RFC 7950 Sec 7.8.2)",
yang_argument_get(ys),
yang_argument_get(ymod)
);
}
}
/* Traverse subs */
if (yang_schemanode(ys) || keyw == Y_MODULE || keyw == Y_SUBMODULE){
yc = NULL;
while ((yc = yn_each(ys, yc)) != NULL){
if (ys_list_check(h, yc) < 0)
goto done;
}
}
retval = 0;
done:
return retval;
}
/*! Parse top yang module including all its sub-modules. Expand and populate yang tree
*
* Perform secondary actions after yang parsing. These actions cannot be made at
@ -986,10 +1049,15 @@ yang_parse_post(clicon_handle h,
if (yang_apply(yspec->ys_stmt[i], -1, ys_populate2, (void*)h) < 0)
goto done;
/* 8: sanity check of schemanode references, need more here */
for (i=modnr; i<yang_len_get(yspec); i++)
/* 8: sanity checks of expanded yangs need more here */
for (i=modnr; i<yang_len_get(yspec); i++){
/* Check schemanode references */
if (yang_apply(yspec->ys_stmt[i], -1, ys_schemanode_check, NULL) < 0)
goto done;
/* Check list key values */
if (ys_list_check(h, yspec->ys_stmt[i]) < 0)
goto done;
}
retval = 0;
done:
return retval;