int
unregister_index(netsnmp_variable_list * varbind, int remember,
netsnmp_session * ss)
{
struct snmp_index *idxptr, *idxptr2;
struct snmp_index *prev_oid_ptr, *prev_idx_ptr;
int res, res2, i;
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(TESTING)
if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE) == SUB_AGENT) {
return (agentx_unregister_index(ss, varbind));
}
#endif
/*
* Look for the requested OID entry
*/
prev_oid_ptr = NULL;
prev_idx_ptr = NULL;
res = 1;
res2 = 1;
for (idxptr = snmp_index_head; idxptr != NULL;
prev_oid_ptr = idxptr, idxptr = idxptr->next_oid) {
if ((res = snmp_oid_compare(varbind->name, varbind->name_length,
idxptr->varbind->name,
idxptr->varbind->name_length)) <= 0)
break;
}
if (res != 0)
return INDEX_ERR_NOT_ALLOCATED;
if (varbind->type != idxptr->varbind->type)
return INDEX_ERR_WRONG_TYPE;
for (idxptr2 = idxptr; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
switch (varbind->type) {
case ASN_INTEGER:
res2 =
(*varbind->val.integer -
*idxptr2->varbind->val.integer);
break;
case ASN_OCTET_STR:
i = SNMP_MIN(varbind->val_len,
idxptr2->varbind->val_len);
res2 =
memcmp(varbind->val.string,
idxptr2->varbind->val.string, i);
break;
case ASN_OBJECT_ID:
res2 =
snmp_oid_compare(varbind->val.objid,
varbind->val_len / sizeof(oid),
idxptr2->varbind->val.objid,
idxptr2->varbind->val_len /
sizeof(oid));
break;
default:
return INDEX_ERR_WRONG_TYPE; /* wrong type */
}
if (res2 <= 0)
break;
}
if (res2 != 0 || (res2 == 0 && !idxptr2->allocated)) {
return INDEX_ERR_NOT_ALLOCATED;
}
if (ss != idxptr2->session)
return INDEX_ERR_WRONG_SESSION;
/*
* If this is a "normal" index unregistration,
* mark the index entry as unused, but leave
* it in situ. This allows differentiation
* between ANY_INDEX and NEW_INDEX
*/
if (remember) {
idxptr2->allocated = 0; /* Unused index */
idxptr2->session = NULL;
return SNMP_ERR_NOERROR;
}
/*
* If this is a failed attempt to register a
* number of indexes, the successful ones
* must be removed completely.
*/
if (prev_idx_ptr) {
prev_idx_ptr->next_idx = idxptr2->next_idx;
} else if (prev_oid_ptr) {
if (idxptr2->next_idx) /* Use p_idx_ptr as a temp variable */
prev_idx_ptr = idxptr2->next_idx;
else
prev_idx_ptr = idxptr2->next_oid;
while (prev_oid_ptr) {
prev_oid_ptr->next_oid = prev_idx_ptr;
prev_oid_ptr = prev_oid_ptr->next_idx;
}
} else {
if (idxptr2->next_idx)
snmp_index_head = idxptr2->next_idx;
else
snmp_index_head = idxptr2->next_oid;
}
snmp_free_var(idxptr2->varbind);
free(idxptr2);
return SNMP_ERR_NOERROR;
}
int
unregister_index(struct variable_list *varbind, int remember, struct snmp_session *ss)
{
struct snmp_index *idxptr, *idxptr2;
struct snmp_index *prev_oid_ptr, *prev_idx_ptr;
int res, res2, i;
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(TESTING)
if (ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_ROLE) == SUB_AGENT )
return( agentx_unregister_index( ss, varbind ));
#endif
/* Look for the requested OID entry */
prev_oid_ptr = NULL;
prev_idx_ptr = NULL;
res = 1;
res2 = 1;
for( idxptr = snmp_index_head ; idxptr != NULL;
prev_oid_ptr = idxptr, idxptr = idxptr->next_oid) {
if ((res = snmp_oid_compare(varbind->name, varbind->name_length,
idxptr->varbind.name,
idxptr->varbind.name_length)) <= 0 )
break;
}
if ( res != 0 )
return INDEX_ERR_NOT_ALLOCATED;
if ( varbind->type != idxptr->varbind.type )
return INDEX_ERR_WRONG_TYPE;
for(idxptr2 = idxptr ; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
i = SNMP_MIN(varbind->val_len, idxptr2->varbind.val_len);
res2 = memcmp(varbind->val.string, idxptr2->varbind.val.string, i);
if ( res2 <= 0 )
break;
}
if ( res2 != 0 )
return INDEX_ERR_NOT_ALLOCATED;
if ( ss != idxptr2->session )
return INDEX_ERR_WRONG_SESSION;
/*
* If this is a "normal" index unregistration,
* mark the index entry as unused, but leave
* it in situ. This allows differentiation
* between ANY_INDEX and NEW_INDEX
*/
if ( remember ) {
idxptr2->session = NULL; /* Unused index */
return SNMP_ERR_NOERROR;
}
/*
* If this is a failed attempt to register a
* number of indexes, the successful ones
* must be removed completely.
*/
if ( prev_idx_ptr ) {
prev_idx_ptr->next_idx = idxptr2->next_idx;
}
else if ( prev_oid_ptr ) {
if ( idxptr2->next_idx ) /* Use p_idx_ptr as a temp variable */
prev_idx_ptr = idxptr2->next_idx;
else
prev_idx_ptr = idxptr2->next_oid;
while ( prev_oid_ptr ) {
prev_oid_ptr->next_oid = prev_idx_ptr;
prev_oid_ptr = prev_oid_ptr->next_idx;
}
}
else {
if ( idxptr2->next_idx )
snmp_index_head = idxptr2->next_idx;
else
snmp_index_head = idxptr2->next_oid;
}
snmp_free_var( (struct variable_list *)idxptr2 );
return SNMP_ERR_NOERROR;
}
