s4-python: import a copy of the python dns library

[idra/samba.git] / source4 / scripting / python / samba_external / dnspython / dns / rdtypes / IN / WKS.py

diff --git a/source4/scripting/python/samba_external/dnspython/dns/rdtypes/IN/WKS.py b/source4/scripting/python/samba_external/dnspython/dns/rdtypes/IN/WKS.py
new file mode 100644 (file)
index 0000000..85aafb3
--- /dev/null
+++ b/source4/scripting/python/samba_external/dnspython/dns/rdtypes/IN/WKS.py
@@ -0,0 +1,113 @@
+# Copyright (C) 2003-2007, 2009, 2010 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.
+
+import socket
+import struct
+
+import dns.ipv4
+import dns.rdata
+
+_proto_tcp = socket.getprotobyname('tcp')
+_proto_udp = socket.getprotobyname('udp')
+
+class WKS(dns.rdata.Rdata):
+    """WKS record
+
+    @ivar address: the address
+    @type address: string
+    @ivar protocol: the protocol
+    @type protocol: int
+    @ivar bitmap: the bitmap
+    @type bitmap: string
+    @see: RFC 1035"""
+
+    __slots__ = ['address', 'protocol', 'bitmap']
+
+    def __init__(self, rdclass, rdtype, address, protocol, bitmap):
+        super(WKS, self).__init__(rdclass, rdtype)
+        self.address = address
+        self.protocol = protocol
+        self.bitmap = bitmap
+
+    def to_text(self, origin=None, relativize=True, **kw):
+        bits = []
+        for i in xrange(0, len(self.bitmap)):
+            byte = ord(self.bitmap[i])
+            for j in xrange(0, 8):
+                if byte & (0x80 >> j):
+                    bits.append(str(i * 8 + j))
+        text = ' '.join(bits)
+        return '%s %d %s' % (self.address, self.protocol, text)
+
+    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
+        address = tok.get_string()
+        protocol = tok.get_string()
+        if protocol.isdigit():
+            protocol = int(protocol)
+        else:
+            protocol = socket.getprotobyname(protocol)
+        bitmap = []
+        while 1:
+            token = tok.get().unescape()
+            if token.is_eol_or_eof():
+                break
+            if token.value.isdigit():
+                serv = int(token.value)
+            else:
+                if protocol != _proto_udp and protocol != _proto_tcp:
+                    raise NotImplementedError("protocol must be TCP or UDP")
+                if protocol == _proto_udp:
+                    protocol_text = "udp"
+                else:
+                    protocol_text = "tcp"
+                serv = socket.getservbyname(token.value, protocol_text)
+            i = serv // 8
+            l = len(bitmap)
+            if l < i + 1:
+                for j in xrange(l, i + 1):
+                    bitmap.append('\x00')
+            bitmap[i] = chr(ord(bitmap[i]) | (0x80 >> (serv % 8)))
+        bitmap = dns.rdata._truncate_bitmap(bitmap)
+        return cls(rdclass, rdtype, address, protocol, bitmap)
+
+    from_text = classmethod(from_text)
+
+    def to_wire(self, file, compress = None, origin = None):
+        file.write(dns.ipv4.inet_aton(self.address))
+        protocol = struct.pack('!B', self.protocol)
+        file.write(protocol)
+        file.write(self.bitmap)
+
+    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
+        address = dns.ipv4.inet_ntoa(wire[current : current + 4])
+        protocol, = struct.unpack('!B', wire[current + 4 : current + 5])
+        current += 5
+        rdlen -= 5
+        bitmap = wire[current : current + rdlen]
+        return cls(rdclass, rdtype, address, protocol, bitmap)
+
+    from_wire = classmethod(from_wire)
+
+    def _cmp(self, other):
+        sa = dns.ipv4.inet_aton(self.address)
+        oa = dns.ipv4.inet_aton(other.address)
+        v = cmp(sa, oa)
+        if v == 0:
+            sp = struct.pack('!B', self.protocol)
+            op = struct.pack('!B', other.protocol)
+            v = cmp(sp, op)
+            if v == 0:
+                v = cmp(self.bitmap, other.bitmap)
+        return v