Method __init__

scapy/utils.py:1626–1661

(self, filename, fdesc=None, magic=None)

                                             "process_information"])

    def __init__(self, filename, fdesc=None, magic=None):  # type: ignore
        # type: (str, IO[bytes], bytes) -> None
        self.filename = filename
        self.f = fdesc
        # A list of (linktype, snaplen, tsresol); will be populated by IDBs.
        self.interfaces = []  # type: List[Tuple[int, int, Dict[str, Any]]]
        self.default_options = {
            "tsresol": 1000000
        }
        self.blocktypes: Dict[
            int,
            Callable[
                [bytes, int],
                Optional[Tuple[bytes, RawPcapNgReader.PacketMetadata]]
            ]] = {
                1: self._read_block_idb,
                2: self._read_block_pkt,
                3: self._read_block_spb,
                6: self._read_block_epb,
                10: self._read_block_dsb,
                0x80000001: self._read_block_pib,
        }
        self.endian = "!"  # Will be overwritten by first SHB
        self.process_information = []  # type: List[Dict[str, Any]]

        if magic != b"\x0a\x0d\x0d\x0a":  # PcapNg:
            raise Scapy_Exception(
                "Not a pcapng capture file (bad magic: %r)" % magic
            )

        try:
            self._read_block_shb()
        except EOFError:
            raise Scapy_Exception(
                "The first SHB of the pcapng file is malformed !"
            )

    def _read_block(self, size=MTU):
        # type: (int) -> Optional[Tuple[bytes, RawPcapNgReader.PacketMetadata]]  # noqa: E501