(self, size=MTU)
| 1661 | ) |
| 1662 | |
| 1663 | def _read_block(self, size=MTU): |
| 1664 | # type: (int) -> Optional[Tuple[bytes, RawPcapNgReader.PacketMetadata]] # noqa: E501 |
| 1665 | try: |
| 1666 | blocktype = struct.unpack(self.endian + "I", self.f.read(4))[0] |
| 1667 | except struct.error: |
| 1668 | raise EOFError |
| 1669 | if blocktype == 0x0A0D0D0A: |
| 1670 | # This function updates the endianness based on the block content. |
| 1671 | self._read_block_shb() |
| 1672 | return None |
| 1673 | try: |
| 1674 | blocklen = struct.unpack(self.endian + "I", self.f.read(4))[0] |
| 1675 | except struct.error: |
| 1676 | warning("PcapNg: Error reading blocklen before block body") |
| 1677 | raise EOFError |
| 1678 | if blocklen < 12: |
| 1679 | warning("PcapNg: Invalid block length !") |
| 1680 | raise EOFError |
| 1681 | |
| 1682 | _block_body_length = blocklen - 12 |
| 1683 | block = self.f.read(_block_body_length) |
| 1684 | if len(block) != _block_body_length: |
| 1685 | raise Scapy_Exception("PcapNg: Invalid Block body length " |
| 1686 | "(too short)") |
| 1687 | self._read_block_tail(blocklen) |
| 1688 | if blocktype in self.blocktypes: |
| 1689 | return self.blocktypes[blocktype](block, size) |
| 1690 | return None |
| 1691 | |
| 1692 | def _read_block_tail(self, blocklen): |
| 1693 | # type: (int) -> None |
no test coverage detected