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SNMP: Dynamic table fixes

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This commit is contained in:
Olof hagsand 2022-06-16 14:26:43 +02:00
parent 150ad3ab8b
commit ebfd173e0b
2 changed files with 102 additions and 40 deletions
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108
apps/snmp/snmp_handler.c
View file

@ -140,7 +140,10 @@ snmp_scalar_return(cxobj *xs,
if ((ret = type_xml2snmp_pre(xml_body(xs), ys, &xmlstr)) < 0)
goto done;
if (ret == 0){
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGVALUE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGVALUE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
}
@ -151,7 +154,10 @@ snmp_scalar_return(cxobj *xs,
}
}
else{
netsnmp_set_request_error(reqinfo, requests, SNMP_NOSUCHINSTANCE);
if ((ret = netsnmp_request_set_error(requests, SNMP_NOSUCHINSTANCE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
if (type_yang2asn1(ys, &asn1type, 1) < 0)
@ -160,7 +166,10 @@ snmp_scalar_return(cxobj *xs,
goto done;
if (ret == 0){
clicon_debug(1, "%s %s", __FUNCTION__, reason);
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGTYPE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGTYPE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
/* see snmplib/snmp_client. somewhat indirect
@ -245,7 +254,10 @@ snmp_scalar_get(clicon_handle h,
if ((ret = type_xml2snmp_pre(xml_body(x), ys, &xmlstr)) < 0)
goto done;
if (ret == 0){
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGVALUE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGVALUE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
}
@ -256,7 +268,10 @@ snmp_scalar_get(clicon_handle h,
}
}
else{
netsnmp_set_request_error(reqinfo, requests, SNMP_NOSUCHINSTANCE);
if ((ret = netsnmp_request_set_error(requests, SNMP_NOSUCHINSTANCE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
if (type_yang2asn1(ys, &asn1type, 1) < 0)
@ -265,7 +280,10 @@ snmp_scalar_get(clicon_handle h,
goto done;
if (ret == 0){
clicon_debug(1, "%s %s", __FUNCTION__, reason);
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGTYPE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGTYPE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto ok;
}
/* see snmplib/snmp_client. somewhat indirect
@ -371,6 +389,7 @@ clixon_snmp_scalar_handler(netsnmp_mib_handler *handler,
clixon_snmp_handle *sh = NULL;
int asn1_type;
netsnmp_variable_list *requestvb = requests->requestvb;
int ret;
clicon_debug(2, "%s", __FUNCTION__);
if (snmp_common_handler(handler, nhreg, reqinfo, requests, &sh, 0) < 0)
@ -391,8 +410,10 @@ clixon_snmp_scalar_handler(netsnmp_mib_handler *handler,
goto done;
if (requestvb->type != asn1_type){
clicon_debug(1, "%s Expected type:%d, got: %d", __FUNCTION__, requestvb->type, asn1_type);
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_WRONGTYPE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGTYPE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
}
break;
case MODE_SET_RESERVE2: /* 1 */
@ -496,6 +517,7 @@ snmp_table_get(clicon_handle h,
clicon_err(OE_UNIX, errno, "cvec_dup");
goto done;
}
/* read through keys and create cvk */
oidilen = oidslen-(oidtlen+1);
oidi = oids+oidtlen+1;
/* Add keys */
@ -536,8 +558,9 @@ snmp_table_get(clicon_handle h,
* @param[in] ylist Yang of table (of list type)
* @param[in] oids OID of ultimate scalar value
* @param[in] oidslen OID length of scalar
* @retval -1 Error
* @retval 0 OK
* @retval 1 OK
* @retval 0 Failed
* @retval -1 Error
*/
static int
snmp_table_getnext(clicon_handle h,
@ -563,9 +586,13 @@ snmp_table_getnext(clicon_handle h,
size_t oidclen = MAX_OID_LEN;
oid oidk[MAX_OID_LEN] = {0,}; /* Key oid */
size_t oidklen = MAX_OID_LEN;
int getnext = 0;
oid oidnext[MAX_OID_LEN] = {0x7fffffff,}; /* Next oid: start with high value */
size_t oidnextlen = MAX_OID_LEN;
int found = 0;
cxobj *xnext = NULL;
yang_stmt *ynext = NULL;
cbuf *cb = NULL;
clicon_debug(1, "%s", __FUNCTION__);
if ((ys = yang_parent_get(ylist)) == NULL ||
yang_keyword_get(ys) != Y_CONTAINER){
@ -606,29 +633,32 @@ snmp_table_getnext(clicon_handle h,
/* Append key oid */
if (oid_append(oidc, &oidclen, oidk, oidklen) < 0)
goto done;
if (getnext){
found++; /* return this */
break;
}
/* Match oidc - key */
if ((ret = oid_eq(oidc, oidclen, oids, oidslen)) == 0){
getnext++; /* return next object if any */
}
else if (ret > 0){
found++; /* return this */
break;
/* Get smallest larger */
if (oid_eq(oidc, oidclen, oids, oidslen) > 0 &&
oid_eq(oidc, oidclen, oidnext, oidnextlen) < 0){
memcpy(oidnext, oidc, oidclen*sizeof(*oidnext));
oidnextlen = oidclen;
xnext = xcol;
ynext = ycol;
found++;
}
} /* while xcol */
if (found)
break;
} /* while xrow */
}
if (found){
if (snmp_scalar_return(xcol, ycol, oidc, oidclen, reqinfo, requests) < 0)
if (snmp_scalar_return(xnext, ynext, oidnext, oidnextlen, reqinfo, requests) < 0)
goto done;
if ((cb = cbuf_new()) == NULL){
clicon_err(OE_UNIX, errno, "cbuf_new");
goto done;
}
oid_cbuf(cb, oidnext, oidnextlen);
clicon_debug(1, "%s next: %s", __FUNCTION__, cbuf_get(cb));
}
retval = 0;
retval = found;
done:
if (cb)
cbuf_free(cb);
if (xpath)
free(xpath);
if (xt)
@ -688,17 +718,31 @@ clixon_snmp_table_handler(netsnmp_mib_handler *handler,
requestvb->name, requestvb->name_length,
reqinfo, requests)) < 0)
goto done;
if (ret == 0)
netsnmp_set_request_error(reqinfo, requests, SNMP_NOSUCHINSTANCE);
if (ret == 0){
if ((ret = netsnmp_request_set_error(requests, SNMP_NOSUCHINSTANCE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
clicon_debug(1, "%s Nosuchinstance", __FUNCTION__);
}
#endif
break;
case MODE_GETNEXT: // 161
#ifdef SNMP_TABLE_DYNAMIC
/* Register table sub-oid:s of existing entries in clixon */
if (snmp_table_getnext(sh->sh_h, sh->sh_ys,
requestvb->name, requestvb->name_length,
reqinfo, requests) < 0)
if ((ret = snmp_table_getnext(sh->sh_h, sh->sh_ys,
requestvb->name, requestvb->name_length,
reqinfo, requests)) < 0)
goto done;
if (ret == 0){
// if ((ret = netsnmp_request_set_error(requests, SNMP_NOSUCHOBJECT)) != SNMPERR_SUCCESS){
if ((ret = netsnmp_request_set_error(requests, SNMP_NOSUCHOBJECT)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
clicon_debug(1, "%s No such object", __FUNCTION__);
}
#endif
break;
case MODE_SET_RESERVE1:

34
apps/snmp/snmp_lib.c
View file

@ -165,7 +165,7 @@ snmp_msg_int2str(int msg)
* @param[in] objid1len Length of second OID vector
* @retval 0 Equal
* @retval !=0 Not equal, see man memcmp
* (Should be netsnmp lib function, cant find it)
* Should really be netsnmp lib function, but cant find any?
*/
int
oid_eq(const oid *objid0,
@ -173,12 +173,24 @@ oid_eq(const oid *objid0,
const oid *objid1,
size_t objid1len)
{
size_t min;
int ret;
if (objid0len < objid1len)
min = objid0len;
else
min = objid1len;
/* First compare common prefix */
ret = memcmp(objid0, objid1, min*sizeof(*objid0));
if (ret != 0)
return ret;
/* If equal, check lengths */
if (objid0len < objid1len)
return -1;
else if (objid0len > objid1len)
return 1;
else
return memcmp(objid0, objid1, objid0len*sizeof(*objid0));
return 0;
}
/*! Append a second OID to a first
@ -470,6 +482,7 @@ type_snmp2xml(yang_stmt *ys,
cg_var *cv = NULL;
char *restype = NULL; /* resolved type */
yang_stmt *yrestype = NULL;
int ret;
clicon_debug(1, "%s", __FUNCTION__);
if (valstr == NULL){
@ -540,7 +553,10 @@ type_snmp2xml(yang_stmt *ys,
default:
assert(0); // XXX
clicon_debug(1, "%s %s not supported", __FUNCTION__, cv_type2str(cvtype));
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_WRONGTYPE);
if ((ret = netsnmp_request_set_error(requests, SNMP_ERR_WRONGTYPE)) != SNMPERR_SUCCESS){
clicon_err(OE_SNMP, ret, "netsnmp_request_set_error");
goto done;
}
goto fail;
break;
}
@ -934,20 +950,22 @@ snmp_oid2str(oid **oidi,
case ASN_COUNTER:
case ASN_IPADDRESS:
cprintf(enc, "%lu", (*oidi)[i++]);
if (cv_string_set(cv, cbuf_get(enc)) < 0){
clicon_err(OE_UNIX, errno, "cv_string_set");
goto done;
}
break;
case ASN_OCTET_STR: /* decode from N.c.c.c.c */
len = (*oidi)[i++];
for (; i<len; i++){
for (; i<len+1; i++){
cprintf(enc, "%c", (char)((*oidi)[i]&0xff));
}
break;
default:
break;
}
if (cbuf_len(enc)){
if (cv_string_set(cv, cbuf_get(enc)) < 0){
clicon_err(OE_UNIX, errno, "cv_string_set");
goto done;
}
}
if (i){
(*oidi) += i;
(*oidilen) -= i;