Class BOOTP

scapy/layers/dhcp.py:91–131

class BOOTP(Packet):
    name = "BOOTP"
    fields_desc = [
        ByteEnumField("op", 1, {1: "BOOTREQUEST", 2: "BOOTREPLY"}),
        ByteEnumField("htype", 1, HARDWARE_TYPES),
        ByteField("hlen", 6),
        ByteField("hops", 0),
        XIntField("xid", 0),
        ShortField("secs", 0),
        FlagsField("flags", 0, 16, "???????????????B"),
        IPField("ciaddr", "0.0.0.0"),
        IPField("yiaddr", "0.0.0.0"),
        IPField("siaddr", "0.0.0.0"),
        IPField("giaddr", "0.0.0.0"),
        _BOOTP_chaddr("chaddr", b"", length=16),
        StrFixedLenField("sname", b"", length=64),
        StrFixedLenField("file", b"", length=128),
        StrEnumField("options", b"", {dhcpmagic: "DHCP magic"})]

    def guess_payload_class(self, payload):
        if self.options[:len(dhcpmagic)] == dhcpmagic:
            return DHCP
        else:
            return Packet.guess_payload_class(self, payload)

    def extract_padding(self, s):
        if self.options[:len(dhcpmagic)] == dhcpmagic:
            # set BOOTP options to DHCP magic cookie and make rest a payload of DHCP options  # noqa: E501
            payload = self.options[len(dhcpmagic):]
            self.options = self.options[:len(dhcpmagic)]
            return payload, None
        else:
            return b"", None

    def hashret(self):
        return struct.pack("!I", self.xid)

    def answers(self, other):
        if not isinstance(other, BOOTP):
            return 0
        return self.xid == other.xid


class _DHCPByteFieldListField(FieldListField):