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, 232 insertions, 0 deletions

diff --git a/source4/scripting/python/samba_external/dnspython/dns/rdatatype.py b/source4/scripting/python/samba_external/dnspython/dns/rdatatype.py
new file mode 100644
index 0000000000..1a02b7d3cd
--- /dev/null
+++ b/source4/scripting/python/samba_external/dnspython/dns/rdatatype.py
@@ -0,0 +1,232 @@
+# Copyright (C) 2001-2007, 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.
+
+"""DNS Rdata Types.
+
+@var _by_text: The rdata type textual name to value mapping
+@type _by_text: dict
+@var _by_value: The rdata type value to textual name mapping
+@type _by_value: dict
+@var _metatypes: If an rdatatype is a metatype, there will be a mapping
+whose key is the rdatatype value and whose value is True in this dictionary.
+@type _metatypes: dict
+@var _singletons: If an rdatatype is a singleton, there will be a mapping
+whose key is the rdatatype value and whose value is True in this dictionary.
+@type _singletons: dict"""
+
+import re
+
+import dns.exception
+
+NONE = 0
+A = 1
+NS = 2
+MD = 3
+MF = 4
+CNAME = 5
+SOA = 6
+MB = 7
+MG = 8
+MR = 9
+NULL = 10
+WKS = 11
+PTR = 12
+HINFO = 13
+MINFO = 14
+MX = 15
+TXT = 16
+RP = 17
+AFSDB = 18
+X25 = 19
+ISDN = 20
+RT = 21
+NSAP = 22
+NSAP_PTR = 23
+SIG = 24
+KEY = 25
+PX = 26
+GPOS = 27
+AAAA = 28
+LOC = 29
+NXT = 30
+SRV = 33
+NAPTR = 35
+KX = 36
+CERT = 37
+A6 = 38
+DNAME = 39
+OPT = 41
+APL = 42
+DS = 43
+SSHFP = 44
+IPSECKEY = 45
+RRSIG = 46
+NSEC = 47
+DNSKEY = 48
+DHCID = 49
+NSEC3 = 50
+NSEC3PARAM = 51
+HIP = 55
+SPF = 99
+UNSPEC = 103
+TKEY = 249
+TSIG = 250
+IXFR = 251
+AXFR = 252
+MAILB = 253
+MAILA = 254
+ANY = 255
+TA = 32768
+DLV = 32769
+
+_by_text = {
+    'NONE' : NONE,
+    'A' : A,
+    'NS' : NS,
+    'MD' : MD,
+    'MF' : MF,
+    'CNAME' : CNAME,
+    'SOA' : SOA,
+    'MB' : MB,
+    'MG' : MG,
+    'MR' : MR,
+    'NULL' : NULL,
+    'WKS' : WKS,
+    'PTR' : PTR,
+    'HINFO' : HINFO,
+    'MINFO' : MINFO,
+    'MX' : MX,
+    'TXT' : TXT,
+    'RP' : RP,
+    'AFSDB' : AFSDB,
+    'X25' : X25,
+    'ISDN' : ISDN,
+    'RT' : RT,
+    'NSAP' : NSAP,
+    'NSAP-PTR' : NSAP_PTR,
+    'SIG' : SIG,
+    'KEY' : KEY,
+    'PX' : PX,
+    'GPOS' : GPOS,
+    'AAAA' : AAAA,
+    'LOC' : LOC,
+    'NXT' : NXT,
+    'SRV' : SRV,
+    'NAPTR' : NAPTR,
+    'KX' : KX,
+    'CERT' : CERT,
+    'A6' : A6,
+    'DNAME' : DNAME,
+    'OPT' : OPT,
+    'APL' : APL,
+    'DS' : DS,
+    'SSHFP' : SSHFP,
+    'IPSECKEY' : IPSECKEY,
+    'RRSIG' : RRSIG,
+    'NSEC' : NSEC,
+    'DNSKEY' : DNSKEY,
+    'DHCID' : DHCID,
+    'NSEC3' : NSEC3,
+    'NSEC3PARAM' : NSEC3PARAM,
+    'HIP' : HIP,
+    'SPF' : SPF,
+    'UNSPEC' : UNSPEC,
+    'TKEY' : TKEY,
+    'TSIG' : TSIG,
+    'IXFR' : IXFR,
+    'AXFR' : AXFR,
+    'MAILB' : MAILB,
+    'MAILA' : MAILA,
+    'ANY' : ANY,
+    'TA' : TA,
+    'DLV' : DLV,
+    }
+
+# We construct the inverse mapping programmatically to ensure that we
+# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
+# would cause the mapping not to be true inverse.
+
+_by_value = dict([(y, x) for x, y in _by_text.iteritems()])
+
+
+_metatypes = {
+    OPT : True
+    }
+
+_singletons = {
+    SOA : True,
+    NXT : True,
+    DNAME : True,
+    NSEC : True,
+    # CNAME is technically a singleton, but we allow multiple CNAMEs.
+    }
+
+_unknown_type_pattern = re.compile('TYPE([0-9]+)$', re.I);
+
+class UnknownRdatatype(dns.exception.DNSException):
+    """Raised if a type is unknown."""
+    pass
+
+def from_text(text):
+    """Convert text into a DNS rdata type value.
+    @param text: the text
+    @type text: string
+    @raises dns.rdatatype.UnknownRdatatype: the type is unknown
+    @raises ValueError: the rdata type value is not >= 0 and <= 65535
+    @rtype: int"""
+
+    value = _by_text.get(text.upper())
+    if value is None:
+        match = _unknown_type_pattern.match(text)
+        if match == None:
+            raise UnknownRdatatype
+        value = int(match.group(1))
+        if value < 0 or value > 65535:
+            raise ValueError("type must be between >= 0 and <= 65535")
+    return value
+
+def to_text(value):
+    """Convert a DNS rdata type to text.
+    @param value: the rdata type value
+    @type value: int
+    @raises ValueError: the rdata type value is not >= 0 and <= 65535
+    @rtype: string"""
+
+    if value < 0 or value > 65535:
+        raise ValueError("type must be between >= 0 and <= 65535")
+    text = _by_value.get(value)
+    if text is None:
+        text = 'TYPE' + `value`
+    return text
+
+def is_metatype(rdtype):
+    """True if the type is a metatype.
+    @param rdtype: the type
+    @type rdtype: int
+    @rtype: bool"""
+
+    if rdtype >= TKEY and rdtype <= ANY or _metatypes.has_key(rdtype):
+        return True
+    return False
+
+def is_singleton(rdtype):
+    """True if the type is a singleton.
+    @param rdtype: the type
+    @type rdtype: int
+    @rtype: bool"""
+
+    if _singletons.has_key(rdtype):
+        return True
+    return False