improve architecture a bit

eive_tmtc/cfdp/tm.py

@@ -0,0 +1,31 @@
+import logging
+
+from eive_tmtc.config.definitions import CFDP_APID
+from spacepackets.ccsds import SPACE_PACKET_HEADER_SIZE
+from spacepackets.cfdp import PduFactory, PduType, DirectiveType
+from tmtccmd.cfdp.handler import CfdpInCcsdsHandler
+from tmtccmd.tm import SpecificApidHandlerBase
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class CfdpInCcsdsWrapper(SpecificApidHandlerBase):
+    def __init__(self, cfdp_in_ccsds_handler: CfdpInCcsdsHandler):
+        super().__init__(CFDP_APID, None)
+        self.handler = cfdp_in_ccsds_handler
+
+    def handle_tm(self, packet: bytes, _user_args: any):
+        # Ignore the space packet header. Its only purpose is to use the same protocol and
+        # have a seaprate APID for space packets. If this function is called, the APID is correct.
+        pdu = packet[SPACE_PACKET_HEADER_SIZE:]
+        pdu_base = PduFactory.from_raw(pdu)
+        if pdu_base.pdu_type == PduType.FILE_DATA:
+            _LOGGER.info("Received File Data PDU TM")
+        else:
+            if pdu_base.directive_type == DirectiveType.FINISHED_PDU:
+                _LOGGER.info("Received Finished PDU TM")
+            else:
+                _LOGGER.info(
+                    f"Received File Directive PDU with type {pdu_base.directive_type!r} TM"
+                )
+        self.handler.pass_pdu_packet(pdu_base)