Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/dns/opcode.py

@@ -0,0 +1,117 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2001-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Opcodes."""
+
+import dns.enum
+import dns.exception
+
+
+class Opcode(dns.enum.IntEnum):
+    #: Query
+    QUERY = 0
+    #: Inverse Query (historical)
+    IQUERY = 1
+    #: Server Status (unspecified and unimplemented anywhere)
+    STATUS = 2
+    #: Notify
+    NOTIFY = 4
+    #: Dynamic Update
+    UPDATE = 5
+
+    @classmethod
+    def _maximum(cls):
+        return 15
+
+    @classmethod
+    def _unknown_exception_class(cls):
+        return UnknownOpcode
+
+
+class UnknownOpcode(dns.exception.DNSException):
+    """An DNS opcode is unknown."""
+
+
+def from_text(text: str) -> Opcode:
+    """Convert text into an opcode.
+
+    *text*, a ``str``, the textual opcode
+
+    Raises ``dns.opcode.UnknownOpcode`` if the opcode is unknown.
+
+    Returns an ``int``.
+    """
+
+    return Opcode.from_text(text)
+
+
+def from_flags(flags: int) -> Opcode:
+    """Extract an opcode from DNS message flags.
+
+    *flags*, an ``int``, the DNS flags.
+
+    Returns an ``int``.
+    """
+
+    return Opcode((flags & 0x7800) >> 11)
+
+
+def to_flags(value: Opcode) -> int:
+    """Convert an opcode to a value suitable for ORing into DNS message
+    flags.
+
+    *value*, an ``int``, the DNS opcode value.
+
+    Returns an ``int``.
+    """
+
+    return (value << 11) & 0x7800
+
+
+def to_text(value: Opcode) -> str:
+    """Convert an opcode to text.
+
+    *value*, an ``int`` the opcode value,
+
+    Raises ``dns.opcode.UnknownOpcode`` if the opcode is unknown.
+
+    Returns a ``str``.
+    """
+
+    return Opcode.to_text(value)
+
+
+def is_update(flags: int) -> bool:
+    """Is the opcode in flags UPDATE?
+
+    *flags*, an ``int``, the DNS message flags.
+
+    Returns a ``bool``.
+    """
+
+    return from_flags(flags) == Opcode.UPDATE
+
+
+### BEGIN generated Opcode constants
+
+QUERY = Opcode.QUERY
+IQUERY = Opcode.IQUERY
+STATUS = Opcode.STATUS
+NOTIFY = Opcode.NOTIFY
+UPDATE = Opcode.UPDATE
+
+### END generated Opcode constants