Function from_wire

dns/name.py:1108–1131

Convert possibly compressed wire format into a Name. *message* is a ``bytes`` containing an entire DNS message in DNS wire form. *current*, an ``int``, is the offset of the beginning of the name from the start of the message Raises ``dns.name.BadPointer`` if a compression poin

(message: bytes, current: int)

def from_wire(message: bytes, current: int) -> Tuple[Name, int]:
    """Convert possibly compressed wire format into a Name.

    *message* is a ``bytes`` containing an entire DNS message in DNS
    wire form.

    *current*, an ``int``, is the offset of the beginning of the name
    from the start of the message

    Raises ``dns.name.BadPointer`` if a compression pointer did not
    point backwards in the message.

    Raises ``dns.name.BadLabelType`` if an invalid label type was encountered.

    Returns a ``(dns.name.Name, int)`` tuple consisting of the name
    that was read and the number of bytes of the wire format message
    which were consumed reading it.
    """

    if not isinstance(message, bytes):
        raise ValueError("input to from_wire() must be a byte string")
    parser = dns.wire.Parser(message, current)
    name = from_wire_parser(parser)
    return (name, parser.current - current)


# RFC 4471 Support