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

This library is not installed on enough systems for us to rely
on it being available. We use the system copy if possible, and
fallback to this local copy

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>

1 files changed, 113 insertions, 0 deletions

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
index 0000000000..85aafb3d23
--- /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