änderungen für mac

2026-06-21 11:40:15 +02:00
parent fe9973f831
commit a89c3df49b
4549 changed files with 576393 additions and 0 deletions
@@ -0,0 +1,51 @@
+from ipaddress import ip_address
+from sys import stderr
+
+from dns.name import from_text, root
+from dns.resolver import NXDOMAIN, NoAnswer, Resolver, Timeout
+
+from .provider import DNSProvider
+
+
+class DNSPythonProvider(DNSProvider):
+    def configure(self, dns_servers, *, bind_addresses=None, search_domains=()):
+        super().configure(dns_servers, bind_addresses=bind_addresses, search_domains=search_domains)
+
+        self.resolver = Resolver(configure=False)
+        self.resolver.domain = root
+        self.resolver.search = [from_text(d) for d in search_domains]
+
+        self.rectypes = []
+        if self.bind_addresses is None or any(a.version == 4 for a in self.bind_addresses):
+            self.rectypes.append('A')
+        if self.bind_addresses is None or any(a.version == 6 for a in self.bind_addresses):
+            self.rectypes.append('AAAA')
+
+    def lookup_host(self, hostname, keep_going=True):
+        result = set()
+
+        for source in self.bind_addresses or [None]:
+            if source is None:
+                self.resolver.nameservers = self.dns_servers
+            else:
+                self.resolver.nameservers = [str(dns) for dns in self.dns_servers if dns.version == source.version]
+                if not self.resolver.nameservers:
+                    continue
+
+            for rectype in self.rectypes:
+                try:
+                    # print("Issuing query for hostname %r, rectype %r, source %r, search %r, nameservers %r" % (
+                    #     hostname, rectype, source, self.resolver.search, self.resolver.nameservers), file=stderr)
+                    a = self.resolver.query(hostname, rectype, source=None if source is None else str(source))
+                    print("Got results: %r" % list(a), file=stderr)
+                except (NXDOMAIN, NoAnswer):
+                    pass
+                except Timeout:
+                    # No point in retrying with a different rectype if these DNS server(s) are not responding
+                    break
+                else:
+                    result.update(ip_address(r.address) for r in a)
+                if result and not keep_going:
+                    return result
+
+        return result or None