def to_address(name):
"""Convert a reverse map domain name into textual address form.
@param name: an IPv4 or IPv6 address in reverse-map form.
@type name: dnspython.name.Name object
@rtype: str
"""
if name.is_subdomain(ipv4_reverse_domain):
name = name.relativize(ipv4_reverse_domain)
labels = list(name.labels)
labels.reverse()
text = '.'.join(labels)
# run through inet_aton() to check syntax and make pretty.
return dnspython.ipv4.inet_ntoa(dnspython.ipv4.inet_aton(text))
elif name.is_subdomain(ipv6_reverse_domain):
name = name.relativize(ipv6_reverse_domain)
labels = list(name.labels)
labels.reverse()
parts = []
i = 0
l = len(labels)
while i < l:
parts.append(''.join(labels[i:i+4]))
i += 4
text = ':'.join(parts)
# run through inet_aton() to check syntax and make pretty.
return dnspython.ipv6.inet_ntoa(dnspython.ipv6.inet_aton(text))
else:
raise dnspython.exception.SyntaxError, 'unknown reverse-map address family'
def _validate_name(self, name):
if isinstance(name, (str, unicode)):
name = dnspython.name.from_text(name, None)
elif not isinstance(name, dnspython.name.Name):
raise KeyError, "name parameter must be convertable to a DNS name"
if name.is_absolute():
if not name.is_subdomain(self.origin):
raise KeyError, "name parameter must be a subdomain of the zone origin"
if self.relativize:
name = name.relativize(self.origin)
return name
def to_e164(name, origin=public_enum_domain, want_plus_prefix=True):
"""Convert an ENUM domain name into an E.164 number.
@param name: the ENUM domain name.
@type name: dnspython.name.Name object.
@param origin: A domain containing the ENUM domain name. The
name is relativized to this domain before being converted to text.
@type: dnspython.name.Name object or None
@param want_plus_prefix: if True, add a '+' to the beginning of the
returned number.
@rtype: str
"""
if not origin is None:
name = name.relativize(origin)
dlabels = [d for d in name.labels if (d.isdigit() and len(d) == 1)]
if len(dlabels) != len(name.labels):
raise dnspython.exception.SyntaxError, 'non-digit labels in ENUM domain name'
dlabels.reverse()
text = ''.join(dlabels)
if want_plus_prefix:
text = '+' + text
return text
def _rr_line(self):
"""Process one line from a DNS master file."""
# Name
if self.current_origin is None:
raise UnknownOrigin
token = self.tok.get(want_leading=True)
if token[0] != dnspython.tokenizer.WHITESPACE:
self.last_name = dnspython.name.from_text(token[1], self.current_origin)
else:
token = self.tok.get()
if token[0] == dnspython.tokenizer.EOL or token[0] == dnspython.tokenizer.EOF:
# treat leading WS followed by EOL/EOF as if they were EOL/EOF.
return
self.tok.unget(token)
name = self.last_name
if not name.is_subdomain(self.zone.origin):
self._eat_line()
return
if self.relativize:
name = name.relativize(self.zone.origin)
token = self.tok.get()
if token[0] != dnspython.tokenizer.IDENTIFIER:
raise dnspython.exception.SyntaxError
# TTL
try:
ttl = dnspython.ttl.from_text(token[1])
token = self.tok.get()
if token[0] != dnspython.tokenizer.IDENTIFIER:
raise dnspython.exception.SyntaxError
except dnspython.ttl.BadTTL:
ttl = self.ttl
# Class
try:
rdclass = dnspython.rdataclass.from_text(token[1])
token = self.tok.get()
if token[0] != dnspython.tokenizer.IDENTIFIER:
raise dnspython.exception.SyntaxError
except dnspython.exception.SyntaxError:
raise dnspython.exception.SyntaxError
except:
rdclass = self.zone.rdclass
if rdclass != self.zone.rdclass:
raise dnspython.exception.SyntaxError, "RR class is not zone's class"
# Type
try:
rdtype = dnspython.rdatatype.from_text(token[1])
except:
raise dnspython.exception.SyntaxError, "unknown rdatatype '%s'" % token[1]
n = self.zone.nodes.get(name)
if n is None:
n = self.zone.node_factory()
self.zone.nodes[name] = n
try:
rd = dnspython.rdata.from_text(rdclass, rdtype, self.tok, self.current_origin, False)
except dnspython.exception.SyntaxError:
# Catch and reraise.
(ty, va) = sys.exc_info()[:2]
raise ty, va
except:
# All exceptions that occur in the processing of rdata
# are treated as syntax errors. This is not strictly
# correct, but it is correct almost all of the time.
# We convert them to syntax errors so that we can emit
# helpful filename:line info.
(ty, va) = sys.exc_info()[:2]
raise dnspython.exception.SyntaxError, "caught exception %s: %s" % (str(ty), str(va))
rd.choose_relativity(self.zone.origin, self.relativize)
covers = rd.covers()
rds = n.find_rdataset(rdclass, rdtype, covers, True)
rds.add(rd, ttl)
def _get_section(self, section, count):
"""Read the next I{count} records from the wire data and add them to
the specified section.
@param section: the section of the message to which to add records
@type section: list of dnspython.rrset.RRset objects
@param count: the number of records to read
@type count: int"""
if self.updating or self.one_rr_per_rrset:
force_unique = True
else:
force_unique = False
seen_opt = False
for i in xrange(0, count):
rr_start = self.current
(name, used) = dnspython.name.from_wire(self.wire, self.current)
absolute_name = name
if not self.message.origin is None:
name = name.relativize(self.message.origin)
self.current = self.current + used
(rdtype, rdclass, ttl, rdlen) = \
struct.unpack('!HHIH',
self.wire[self.current:self.current + 10])
self.current = self.current + 10
if rdtype == dnspython.rdatatype.OPT:
if not section is self.message.additional or seen_opt:
raise BadEDNS
self.message.payload = rdclass
self.message.ednsflags = ttl
self.message.edns = (ttl & 0xff0000) >> 16
self.message.options = []
current = self.current
optslen = rdlen
while optslen > 0:
(otype, olen) = \
struct.unpack('!HH',
self.wire[current:current + 4])
current = current + 4
opt = dnspython.ednspython.option_from_wire(otype, self.wire, current, olen)
self.message.options.append(opt)
current = current + olen
optslen = optslen - 4 - olen
seen_opt = True
elif rdtype == dnspython.rdatatype.TSIG:
if not (section is self.message.additional and
i == (count - 1)):
raise BadTSIG
if self.message.keyring is None:
raise UnknownTSIGKey, 'got signed message without keyring'
secret = self.message.keyring.get(absolute_name)
if secret is None:
raise UnknownTSIGKey, "key '%s' unknown" % name
self.message.tsig_ctx = \
dnspython.tsig.validate(self.wire,
absolute_name,
secret,
int(time.time()),
self.message.request_mac,
rr_start,
self.current,
rdlen,
self.message.tsig_ctx,
self.message.multi,
self.message.first)
self.message.had_tsig = True
else:
if ttl < 0:
ttl = 0
if self.updating and \
(rdclass == dnspython.rdataclass.ANY or
rdclass == dnspython.rdataclass.NONE):
deleting = rdclass
rdclass = self.zone_rdclass
else:
deleting = None
if deleting == dnspython.rdataclass.ANY or \
(deleting == dnspython.rdataclass.NONE and \
section == self.message.answer):
covers = dnspython.rdatatype.NONE
rd = None
else:
rd = dnspython.rdata.from_wire(rdclass, rdtype, self.wire,
self.current, rdlen,
self.message.origin)
covers = rd.covers()
if self.message.xfr and rdtype == dnspython.rdatatype.SOA:
force_unique = True
rrset = self.message.find_rrset(section, name,
rdclass, rdtype, covers,
deleting, True, force_unique)
if not rd is None:
rrset.add(rd, ttl)
self.current = self.current + rdlen
