author | Tero Marttila <terom@paivola.fi> |
Thu, 15 Mar 2012 18:33:36 +0200 | |
changeset 4 | 3a2221124592 |
parent 0 | f0ac5a96fb19 |
child 12 | bddc9a060a73 |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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""" |
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Process zonefiles. |
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""" |
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__version__ = '0.0.1-dev' |
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import optparse |
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import codecs |
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import logging |
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log = logging.getLogger() |
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# command-line options, global state |
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options = None |
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def parse_options (argv) : |
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""" |
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Parse command-line arguments. |
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""" |
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parser = optparse.OptionParser( |
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prog = argv[0], |
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usage = '%prog: [options]', |
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version = __version__, |
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# module docstring |
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description = __doc__, |
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) |
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# logging |
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general = optparse.OptionGroup(parser, "General Options") |
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general.add_option('-q', '--quiet', dest='loglevel', action='store_const', const=logging.ERROR, help="Less output") |
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general.add_option('-v', '--verbose', dest='loglevel', action='store_const', const=logging.INFO, help="More output") |
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general.add_option('-D', '--debug', dest='loglevel', action='store_const', const=logging.DEBUG, help="Even more output") |
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parser.add_option_group(general) |
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parser.add_option('-c', '--input-charset', metavar='CHARSET', default='utf-8', |
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help="Encoding used for input files") |
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parser.add_option('-o', '--output', metavar='FILE', default='-', |
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help="Write to output file; default stdout") |
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parser.add_option('--output-charset', metavar='CHARSET', default='utf-8', |
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help="Encoding used for output files") |
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parser.add_option('--forward-zone', action='store_true', |
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help="Generate forward zone") |
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parser.add_option('--forward-txt', action='store_true', |
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help="Generate TXT records for forward zone") |
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parser.add_option('--forward-mx', metavar='MX', |
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help="Generate MX records for forward zone") |
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parser.add_option('--reverse-domain', metavar='DOMAIN', |
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help="Domain to use for hosts in reverse zone") |
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parser.add_option('--reverse-zone', metavar='NET', |
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help="Generate forward zone for given subnet (x.z.y)") |
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# defaults |
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parser.set_defaults( |
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loglevel = logging.WARN, |
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) |
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# parse |
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options, args = parser.parse_args(argv[1:]) |
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# configure |
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logging.basicConfig( |
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format = '%(processName)s: %(name)s: %(levelname)s %(funcName)s : %(message)s', |
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level = options.loglevel, |
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) |
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return options, args |
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def parse_record (line) : |
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""" |
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Parse (name, ttl, type, data, comment) from bind zonefile. |
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Returns None for empty/comment lines. |
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""" |
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# was line indented? |
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indent = line.startswith(' ') or line.startswith('\t') |
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# strip |
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line = line.strip() |
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if not line or line.startswith(';') : |
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# skip |
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return |
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#log.debug("line=%r", line) |
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# parse comment out |
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parts = line.split(';', 1) |
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if ';' in line : |
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data, comment = line.split(';', 1) |
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line = data.rstrip() |
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comment = comment.strip() |
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else : |
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line = line.rstrip() |
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comment = None |
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#log.debug("line=%r, comment=%r", line, comment) |
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# parse data out? |
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if '"' in line : |
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line, data, end = line.split('"') |
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parts = line.split() |
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else : |
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parts = line.split() |
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122 |
data = parts.pop(-1) |
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|
123 |
|
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124 |
#log.debug("parts=%r, data=%r", parts, data) |
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|
125 |
|
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126 |
# indented lines don't have name |
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|
127 |
if indent : |
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|
128 |
name = None |
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|
129 |
|
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|
130 |
else : |
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131 |
name = parts.pop(0) |
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|
132 |
|
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133 |
#log.debug("name=%r", name) |
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|
134 |
|
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|
135 |
# parse ttl/cls/type |
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|
136 |
ttl = cls = None |
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|
137 |
|
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|
138 |
if parts and parts[0][0].isdigit() : |
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|
139 |
ttl = parts.pop(0) |
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|
140 |
|
4
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|
141 |
if parts and parts[0].upper() in ('IN', 'CH') : |
0
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142 |
cls = parts.pop(0) |
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143 |
|
4
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144 |
type = parts.pop(0) |
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|
145 |
|
0
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|
146 |
#log.debug("ttl=%r, cls=%r, parts=%r", ttl, cls, parts) |
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|
147 |
|
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148 |
if parts : |
4
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149 |
log.debug("extra data: %r + %r", parts, data) |
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150 |
|
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|
151 |
# extra data |
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152 |
data = ' '.join(parts + [data]) |
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|
153 |
|
0
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|
154 |
|
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|
155 |
return name, ttl, type, data, comment |
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|
156 |
|
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parents:
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|
157 |
def parse_zone (file) : |
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|
158 |
""" |
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|
159 |
Parse |
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160 |
(name, ttl, type, data, comment) |
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|
161 |
data from zonefile. |
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|
162 |
""" |
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parents:
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|
163 |
|
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parents:
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|
164 |
for lineno, line in enumerate(file) : |
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|
165 |
data = parse_record(line) |
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parents:
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|
166 |
|
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parents:
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|
167 |
if data : |
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parents:
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|
168 |
yield data |
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parents:
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|
169 |
|
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|
170 |
def process_zone_forwards (zone, txt=False, mx=False) : |
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|
171 |
""" |
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parents:
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|
172 |
Process zone data -> forward zone data. |
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parents:
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|
173 |
""" |
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parents:
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changeset
|
174 |
|
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|
175 |
for name, ttl, type, data, comment in zone : |
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|
176 |
yield name, ttl, type, data |
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|
177 |
|
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|
178 |
if type == 'A' : |
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|
179 |
if txt and comment : |
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|
180 |
# name |
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|
181 |
yield None, ttl, 'TXT', u'"{0}"'.format(comment) |
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parents:
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|
182 |
|
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parents:
diff
changeset
|
183 |
# XXX: RP, do we need it? |
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parents:
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|
184 |
|
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parents:
diff
changeset
|
185 |
if mx : |
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parents:
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|
186 |
# XXX: is this a good idea? |
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|
187 |
yield None, ttl, 'MX', '10 {mx}'.format(mx=mx) |
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parents:
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|
188 |
|
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parents:
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|
189 |
def reverse_addr (ip) : |
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parents:
diff
changeset
|
190 |
""" |
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parents:
diff
changeset
|
191 |
Return in-addr.arpa reverse for given IPv4 IP. |
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parents:
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|
192 |
""" |
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parents:
diff
changeset
|
193 |
|
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parents:
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changeset
|
194 |
# parse |
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parents:
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|
195 |
octets = tuple(int(part) for part in ip.split('.')) |
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parents:
diff
changeset
|
196 |
|
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parents:
diff
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|
197 |
for octet in octets : |
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parents:
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|
198 |
assert 0 <= octet <= 255 |
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parents:
diff
changeset
|
199 |
|
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parents:
diff
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|
200 |
return '.'.join([str(octet) for octet in reversed(octets)] + ['in-addr', 'arpa']) |
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parents:
diff
changeset
|
201 |
|
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parents:
diff
changeset
|
202 |
def fqdn (*parts) : |
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parents:
diff
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|
203 |
return '.'.join(parts) + '.' |
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parents:
diff
changeset
|
204 |
|
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parents:
diff
changeset
|
205 |
|
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parents:
diff
changeset
|
206 |
def process_zone_reverse (zone, origin, domain) : |
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parents:
diff
changeset
|
207 |
""" |
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parents:
diff
changeset
|
208 |
Process zone data -> reverse zone data. |
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parents:
diff
changeset
|
209 |
""" |
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parents:
diff
changeset
|
210 |
|
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parents:
diff
changeset
|
211 |
for name, ttl, type, data, comment in zone : |
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parents:
diff
changeset
|
212 |
if type != 'A' : |
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parents:
diff
changeset
|
213 |
continue |
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parents:
diff
changeset
|
214 |
|
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parents:
diff
changeset
|
215 |
ip = data |
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parents:
diff
changeset
|
216 |
|
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parents:
diff
changeset
|
217 |
# generate reverse-addr |
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parents:
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|
218 |
reverse = reverse_addr(ip) |
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parents:
diff
changeset
|
219 |
|
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parents:
diff
changeset
|
220 |
# verify |
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parents:
diff
changeset
|
221 |
if zone and reverse.endswith(origin) : |
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parents:
diff
changeset
|
222 |
reverse = reverse[:-(len(origin) + 1)] |
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parents:
diff
changeset
|
223 |
|
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parents:
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|
224 |
else : |
4
3a2221124592
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parents:
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diff
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|
225 |
log.warning("Reverse does not match zone origin, skipping: (%s) -> %s <-> %s", ip, reverse, origin) |
0
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changeset
|
226 |
continue |
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parents:
diff
changeset
|
227 |
|
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parents:
diff
changeset
|
228 |
# domain to use |
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parents:
diff
changeset
|
229 |
host_domain = domain |
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parents:
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|
230 |
host_fqdn = fqdn(name, domain) |
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parents:
diff
changeset
|
231 |
|
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parents:
diff
changeset
|
232 |
yield reverse, 'PTR', host_fqdn |
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parents:
diff
changeset
|
233 |
|
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parents:
diff
changeset
|
234 |
def build_zone (zone) : |
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parents:
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|
235 |
for item in zone : |
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parents:
diff
changeset
|
236 |
ttl = cls = comment = None |
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parents:
diff
changeset
|
237 |
|
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parents:
diff
changeset
|
238 |
if len(item) == 3 : |
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parents:
diff
changeset
|
239 |
name, type, data = item |
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parents:
diff
changeset
|
240 |
|
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parents:
diff
changeset
|
241 |
elif len(item) == 4 : |
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parents:
diff
changeset
|
242 |
name, ttl, type, data = item |
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parents:
diff
changeset
|
243 |
|
f0ac5a96fb19
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parents:
diff
changeset
|
244 |
elif len(item) == 5 : |
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245 |
name, ttl, type, data, comment = item |
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246 |
|
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247 |
else : |
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248 |
raise Exception("Weird zone entry: {0}".format(item)) |
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249 |
|
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250 |
if not name : |
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251 |
name = '' |
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252 |
|
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253 |
if not ttl : |
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254 |
ttl = '' |
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|
255 |
|
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256 |
if not cls : |
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257 |
cls = '' |
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|
258 |
|
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|
259 |
if comment : |
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260 |
comment = '\t;' + comment |
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261 |
else : |
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262 |
comment = '' |
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|
263 |
|
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264 |
yield u"{name:25} {ttl:4} {cls:2} {type:5} {data}{comment}".format(name=name, ttl=ttl, cls=cls, type=type, data=data, comment=comment) |
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|
265 |
|
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266 |
def write_zone (file, zone) : |
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267 |
for line in build_zone(zone) : |
4
3a2221124592
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file.write(line + u'\n') |
0
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269 |
|
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270 |
def open_file (path, mode, charset) : |
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271 |
""" |
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272 |
Open unicode-enabled file from path, with - using stdio. |
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273 |
""" |
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|
274 |
|
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275 |
if path == '-' : |
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276 |
# use stdin/out based on mode |
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|
277 |
stream, func = { |
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278 |
'r': (sys.stdin, codecs.getreader), |
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279 |
'w': (sys.stdout, codecs.getwriter), |
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|
280 |
}[mode[0]] |
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|
281 |
|
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|
282 |
# wrap |
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|
283 |
return func(charset)(stream) |
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parents:
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|
284 |
|
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parents:
diff
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|
285 |
else : |
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|
286 |
# open |
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|
287 |
return codecs.open(path, mode, charset) |
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parents:
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|
288 |
|
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parents:
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|
289 |
def main (argv) : |
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parents:
diff
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|
290 |
global options |
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|
291 |
|
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|
292 |
options, args = parse_options(argv) |
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|
293 |
|
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|
294 |
if args : |
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|
295 |
# open files |
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|
296 |
input_files = [open_file(path, 'r', options.input_charset) for path in args] |
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|
297 |
|
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parents:
diff
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|
298 |
else : |
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parents:
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|
299 |
# default to stdout |
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|
300 |
input_files = [open_file('-', 'r', options.input_charset)] |
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parents:
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|
301 |
|
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parents:
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|
302 |
# process zone data |
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parents:
diff
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|
303 |
zone = [] |
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parents:
diff
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|
304 |
|
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parents:
diff
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|
305 |
for file in input_files : |
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parents:
diff
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|
306 |
log.info("Reading zone: %s", file) |
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parents:
diff
changeset
|
307 |
|
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parents:
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changeset
|
308 |
zone += list(parse_zone(file)) |
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parents:
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|
309 |
|
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parents:
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|
310 |
# output file |
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parents:
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|
311 |
output = open_file(options.output, 'w', options.output_charset) |
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parents:
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|
312 |
|
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parents:
diff
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|
313 |
if options.forward_zone : |
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parents:
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|
314 |
log.info("Write forward zone: %s", output) |
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parents:
diff
changeset
|
315 |
|
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parents:
diff
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|
316 |
zone = list(process_zone_forwards(zone, txt=options.forward_txt, mx=options.forward_mx)) |
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parents:
diff
changeset
|
317 |
|
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parents:
diff
changeset
|
318 |
elif options.reverse_zone : |
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parents:
diff
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|
319 |
origin = reverse_addr(options.reverse_zone) |
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parents:
diff
changeset
|
320 |
domain = options.reverse_domain |
f0ac5a96fb19
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parents:
diff
changeset
|
321 |
|
f0ac5a96fb19
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Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
322 |
if not domain : |
f0ac5a96fb19
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Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
323 |
log.error("--reverse-zone requires --reverse-domain") |
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Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
324 |
return 1 |
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parents:
diff
changeset
|
325 |
|
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parents:
diff
changeset
|
326 |
zone = list(process_zone_reverse(zone, origin=origin, domain=domain)) |
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parents:
diff
changeset
|
327 |
|
f0ac5a96fb19
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parents:
diff
changeset
|
328 |
else : |
f0ac5a96fb19
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parents:
diff
changeset
|
329 |
log.warn("Nothing to do") |
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parents:
diff
changeset
|
330 |
|
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parents:
diff
changeset
|
331 |
write_zone(output, zone) |
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parents:
diff
changeset
|
332 |
|
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Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
333 |
return 0 |
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parents:
diff
changeset
|
334 |
|
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parents:
diff
changeset
|
335 |
if __name__ == '__main__': |
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parents:
diff
changeset
|
336 |
import sys |
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parents:
diff
changeset
|
337 |
|
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parents:
diff
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|
338 |
sys.exit(main(sys.argv)) |