Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/dns/rdtypes/euibase.py

@@ -0,0 +1,70 @@
+# Copyright (C) 2015 Red Hat, Inc.
+# Author: Petr Spacek <pspacek@redhat.com>
+#
+# 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 RED HAT 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.
+
+import binascii
+
+import dns.immutable
+import dns.rdata
+
+
+@dns.immutable.immutable
+class EUIBase(dns.rdata.Rdata):
+    """EUIxx record"""
+
+    # see: rfc7043.txt
+
+    __slots__ = ["eui"]
+    # define these in subclasses
+    # byte_len = 6  # 0123456789ab (in hex)
+    # text_len = byte_len * 3 - 1  # 01-23-45-67-89-ab
+
+    def __init__(self, rdclass, rdtype, eui):
+        super().__init__(rdclass, rdtype)
+        self.eui = self._as_bytes(eui)
+        if len(self.eui) != self.byte_len:
+            raise dns.exception.FormError(
+                f"EUI{self.byte_len * 8} rdata has to have {self.byte_len} bytes"
+            )
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        return dns.rdata._hexify(self.eui, chunksize=2, separator=b"-", **kw)
+
+    @classmethod
+    def from_text(
+        cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
+    ):
+        text = tok.get_string()
+        if len(text) != cls.text_len:
+            raise dns.exception.SyntaxError(
+                f"Input text must have {cls.text_len} characters"
+            )
+        for i in range(2, cls.byte_len * 3 - 1, 3):
+            if text[i] != "-":
+                raise dns.exception.SyntaxError(f"Dash expected at position {i}")
+        text = text.replace("-", "")
+        try:
+            data = binascii.unhexlify(text.encode())
+        except (ValueError, TypeError) as ex:
+            raise dns.exception.SyntaxError(f"Hex decoding error: {str(ex)}")
+        return cls(rdclass, rdtype, data)
+
+    def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
+        file.write(self.eui)
+
+    @classmethod
+    def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
+        eui = parser.get_bytes(cls.byte_len)
+        return cls(rdclass, rdtype, eui)