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bind: parse zones files

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Signed-off-by: Nektarios Katakis <iam@nektarioskatakis.xyz>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
This commit is contained in:
Nektarios Katakis 2020-02-04 14:20:30 +00:00 committed by James Valleroy
parent 4ac8e2c15f
commit 19f9436457
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1 changed files with 84 additions and 0 deletions
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84
plinth/modules/bind/__init__.py
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@ -18,7 +18,10 @@
FreedomBox app to configure BIND server. FreedomBox app to configure BIND server.
""" """
import augeas
import re import re
from collections import defaultdict
from pathlib import Path
from django.utils.translation import ugettext_lazy as _ from django.utils.translation import ugettext_lazy as _
@ -58,6 +61,7 @@ port_forwarding_info = [
] ]
CONFIG_FILE = '/etc/bind/named.conf.options' CONFIG_FILE = '/etc/bind/named.conf.options'
ZONES_DIR = '/var/bind/pri'
DEFAULT_CONFIG = ''' DEFAULT_CONFIG = '''
acl goodclients { acl goodclients {
@ -195,3 +199,83 @@ def set_dnssec(choice):
line = '//' + line line = '//' + line
conf_file.write(line + '\n') conf_file.write(line + '\n')
conf_file.close() conf_file.close()
def get_served_domains():
"""
Augeas path for zone files:
===========================
augtool> print /files/var/bind/pri/local.zone
/files/var/bind/pri/local.zone
/files/var/bind/pri/local.zone/$TTL = "604800"
/files/var/bind/pri/local.zone/@[1]
/files/var/bind/pri/local.zone/@[1]/1
/files/var/bind/pri/local.zone/@[1]/1/class = "IN"
/files/var/bind/pri/local.zone/@[1]/1/type = "SOA"
/files/var/bind/pri/local.zone/@[1]/1/mname = "localhost."
/files/var/bind/pri/local.zone/@[1]/1/rname = "root.localhost."
/files/var/bind/pri/local.zone/@[1]/1/serial = "2"
/files/var/bind/pri/local.zone/@[1]/1/refresh = "604800"
/files/var/bind/pri/local.zone/@[1]/1/retry = "86400"
/files/var/bind/pri/local.zone/@[1]/1/expiry = "2419200"
/files/var/bind/pri/local.zone/@[1]/1/minimum = "604800"
/files/var/bind/pri/local.zone/@[2]
/files/var/bind/pri/local.zone/@[2]/1
/files/var/bind/pri/local.zone/@[2]/1/class = "IN"
/files/var/bind/pri/local.zone/@[2]/1/type = "NS"
/files/var/bind/pri/local.zone/@[2]/1/rdata = "localhost."
/files/var/bind/pri/local.zone/@[3]
/files/var/bind/pri/local.zone/@[3]/1
/files/var/bind/pri/local.zone/@[3]/1/class = "IN"
/files/var/bind/pri/local.zone/@[3]/1/type = "A"
/files/var/bind/pri/local.zone/@[3]/1/rdata = "127.0.0.1"
/files/var/bind/pri/local.zone/@[4]
/files/var/bind/pri/local.zone/@[4]/1
/files/var/bind/pri/local.zone/@[4]/1/class = "IN"
/files/var/bind/pri/local.zone/@[4]/1/type = "AAAA"
/files/var/bind/pri/local.zone/@[4]/1/rdata = "::1"
Need to find the related functionality to parse the A records
Retrieve from /etc/bind/db* zone files all the configured A records.
Assuming zones files in ZONES_DIR are all used.
:return: dictionary in the form 'domain_name': ['ip_address', 'ipv6_addr']
"""
RECORD_TYPES = ('A', 'AAAA')
aug = augeas.Augeas(
flags=augeas.Augeas.NO_LOAD + augeas.Augeas.NO_MODL_AUTOLOAD)
aug.set('/augeas/load/Dns_Zone/lens', 'Dns_Zone.lns')
zone_file_path = Path(ZONES_DIR)
zone_files = [zf for zf in zone_file_path.iterdir() if zf.is_file()]
# augeas load only required files
for zone_file in zone_files:
aug.set('/augeas/load/Dns_Zone/incl[last() + 1]', str(zone_file))
aug.load()
served_domains = defaultdict(list)
for zone_file in zone_files:
base_path = '/files/%s/@[{record_order}]/1/{field}' % zone_file
count = 1
mname = aug.get(base_path.format(record_order=count, field='mname'))
while True:
record_type = aug.get(base_path.format(record_order=count,
field='type'))
# no record type ends the search
if record_type is None:
break
if record_type in RECORD_TYPES:
served_domains[mname].append(
aug.get(base_path.format(
record_order=count, field='rdata')
)
)
count += 1
return served_domains