348     def checkAnswer(self, suboption):  argument
353         if self.value == suboption[:len(self.value)]:
359 …      self.connection.logger.debug("SB Answer %s -> %r -> %s" % (self.name, suboption, self.state))
687         suboption = None
710                             if suboption is not None:
711                                 suboption.append(byte)
718                             if suboption is not None:
719                                 suboption.append(IAC)
725                             suboption = bytearray()
729                             self._telnetProcessSubnegotiation(bytes(suboption))
730                             suboption = None
776     def _telnetProcessSubnegotiation(self, suboption):  argument
778         if suboption[0:1] == COM_PORT_OPTION:
779             if suboption[1:2] == SERVER_NOTIFY_LINESTATE and len(suboption) >= 3:
780                 self._linestate = ord(suboption[2:3]) # ensure it is a number
783             elif suboption[1:2] == SERVER_NOTIFY_MODEMSTATE and len(suboption) >= 3:
784                 self._modemstate = ord(suboption[2:3]) # ensure it is a number
789             elif suboption[1:2] == FLOWCONTROL_SUSPEND:
791             elif suboption[1:2] == FLOWCONTROL_RESUME:
795                     if item.ack_option == suboption[1:2]:
797                         item.checkAnswer(bytes(suboption[2:]))
801                         self.logger.warning("ignoring COM_PORT_OPTION: %r" % (suboption,))
804                 self.logger.warning("ignoring subnegotiation: %r" % (suboption,))
917         self.suboption = None
1050                     if self.suboption is not None:
1051                         self.suboption.append(byte)
1058                     if self.suboption is not None:
1059                         self.suboption.append(byte)
1065                     self.suboption = bytearray()
1069                     self._telnetProcessSubnegotiation(bytes(self.suboption))
1070                     self.suboption = None
1112     def _telnetProcessSubnegotiation(self, suboption):  argument
1114         if suboption[0:1] == COM_PORT_OPTION:
1116                 self.logger.debug('received COM_PORT_OPTION: %r' % (suboption,))
1117             if suboption[1:2] == SET_BAUDRATE:
1120                     (baudrate,) = struct.unpack("!I", suboption[2:6])
1131             elif suboption[1:2] == SET_DATASIZE:
1134                     (datasize,) = struct.unpack("!B", suboption[2:3])
1145             elif suboption[1:2] == SET_PARITY:
1148                     parity = struct.unpack("!B", suboption[2:3])[0]
1162             elif suboption[1:2] == SET_STOPSIZE:
1165                     stopbits = struct.unpack("!B", suboption[2:3])[0]
1179             elif suboption[1:2] == SET_CONTROL:
1180                 if suboption[2:3] == SET_CONTROL_REQ_FLOW_SETTING:
1187                 elif suboption[2:3] == SET_CONTROL_USE_NO_FLOW_CONTROL:
1193                 elif suboption[2:3] == SET_CONTROL_USE_SW_FLOW_CONTROL:
1198                 elif suboption[2:3] == SET_CONTROL_USE_HW_FLOW_CONTROL:
1203                 elif suboption[2:3] == SET_CONTROL_REQ_BREAK_STATE:
1207                 elif suboption[2:3] == SET_CONTROL_BREAK_ON:
1212                 elif suboption[2:3] == SET_CONTROL_BREAK_OFF:
1217                 elif suboption[2:3] == SET_CONTROL_REQ_DTR:
1221                 elif suboption[2:3] == SET_CONTROL_DTR_ON:
1226                 elif suboption[2:3] == SET_CONTROL_DTR_OFF:
1231                 elif suboption[2:3] == SET_CONTROL_REQ_RTS:
1236                 elif suboption[2:3] == SET_CONTROL_RTS_ON:
1241                 elif suboption[2:3] == SET_CONTROL_RTS_OFF:
1253             elif suboption[1:2] == NOTIFY_LINESTATE:
1259             elif suboption[1:2] == NOTIFY_MODEMSTATE:
1264             elif suboption[1:2] == FLOWCONTROL_SUSPEND:
1268             elif suboption[1:2] == FLOWCONTROL_RESUME:
1272             elif suboption[1:2] == SET_LINESTATE_MASK:
1273                 self.linstate_mask = ord(suboption[2:3]) # ensure it is a number
1276             elif suboption[1:2] == SET_MODEMSTATE_MASK:
1277                 self.modemstate_mask = ord(suboption[2:3]) # ensure it is a number
1280             elif suboption[1:2] == PURGE_DATA:
1281                 if suboption[2:3] == PURGE_RECEIVE_BUFFER:
1286                 elif suboption[2:3] == PURGE_TRANSMIT_BUFFER:
1291                 elif suboption[2:3] == PURGE_BOTH_BUFFERS:
1299                         self.logger.error("undefined PURGE_DATA: %r" % list(suboption[2:]))
1302                     self.logger.error("undefined COM_PORT_OPTION: %r" % list(suboption[1:]))
1305                 self.logger.warning("unknown subnegotiation: %r" % (suboption,))