Secondary with an Unformatted LOGON Message

To initialize a session by having the secondary issue an unformatted LOGON message, set open.lua_init_type to LUA_INIT_TYPE_SEC_LOG. The length of the user's EBCDIC LOGON message is then specified in lua_data_length. The address of the user's EBCDIC LOGON message length is specified by lua_data_ptr.