cstr</td><td>if non-NULL then copy str pointer </td></tr>
    <tr><td class="paramname">ocstrlen</td><td>points to string length, excluding zero terminator. if set to NULL it is assumed that ocstr is NULL-terminated. </td></tr>
    <tr><td class="paramname">bufsize</td><td>size of the buffer in bytes. (this is required because the buffer can be overwritten by snmp-set) if ocstrlen is NULL buffer needs space for terminating 0 byte. otherwise complete buffer is used for string. if bufsize is set to 0, the val