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dnscap/contrib/cdsdump.py

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Adding upstream version 2.0.0+debian. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-08 11:57:11 +01:00
#!/usr/bin/env python3
#
# Copyright (c) 2016-2021, OARC, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import sys
import logging
import optparse
import struct
import socket
from cbor2 import CBORDecoder;
logging.basicConfig(format='%(levelname).5s: %(module)s:%(lineno)d: '
'%(message)s')
log = logging.getLogger(__name__)
class SimpleValue(object):
def __init__(self, value):
self.value = value
def get(self):
return self.value
def __repr__(self):
return "{}".format(self.value)
def decode_simple_value(self, fp, shareable_index=None):
return SimpleValue(struct.unpack('>B', fp.read(1))[0])
try:
from cbor2.types import CBORSimpleValue
except Exception:
CBORSimpleValue = SimpleValue
class LastValues(object):
def __init__(self):
self.reset()
def reset(self):
self.ts = None
self.src_addr4 = None
self.src_port4 = None
self.dest_addr4 = None
self.dest_port4 = None
self.src_addr6 = None
self.src_port6 = None
self.dest_addr6 = None
self.dest_port6 = None
self.rlabel = []
self.mlabel = []
self.rr_type = None
self.rr_class = None
self.rr_ttl = None
last = LastValues()
MAX_RLABELS = 255
MIN_RLABEL_SIZE = 3
def get_rlabel(idx):
rlabel_idx = -idx - 1
try:
label = last.rlabel.pop(rlabel_idx)
last.rlabel.insert(0, label)
return label
except:
raise Exception("rlabel index {} out of range".format(rlabel_idx))
def add_rlabel(label):
size = 0
if isinstance(label, list):
for l in label:
if isinstance(l, str):
size += len(l)
if size < MIN_RLABEL_SIZE:
return
last.rlabel.insert(0, label)
if len(last.rlabel) > MAX_RLABELS:
last.rlabel.pop()
def build_mlabel_label(label):
if isinstance(label, int) and label < 0:
label = get_rlabel(label)
else:
add_rlabel(label)
if isinstance(label, str):
last.mlabel.append(label)
elif isinstance(label, list):
if len(label) and isinstance(label[0], int):
last.mlabel.append(label)
return
label = list(label)
while len(label):
last.mlabel.append(list(label))
label.pop(0)
def build_mlabel(rrs):
for rr in rrs:
if len(rr) and isinstance(rr[0], bool):
continue
if len(rr):
build_mlabel_label(rr[0])
if len(rr) > 1 and isinstance(rr[len(rr)-1], list):
for l in rr[len(rr)-1]:
build_mlabel_label(l)
def parse_label(label, lvl):
if isinstance(label, int) and label < 0:
label = get_rlabel(label)
else:
add_rlabel(label)
if isinstance(label, bytes):
print((" " * lvl)+"label: {}".format(bytes))
elif isinstance(label, list):
if len(label) and isinstance(label[0], int) and label[0] < 0:
dn = list(get_rlabel(label[0]))
else:
dn = list(label)
print((" " * lvl)+"clabel: {}".format(dn))
dnstr = []
seen_mlabel = {}
while len(dn):
while isinstance(dn[0], int):
if dn[0] in seen_mlabel:
dn = [ "{ name compression loop }" ]
break
seen_mlabel[dn[0]] = 1
dn = list(last.mlabel[dn[0]])
dnstr.append(dn.pop(0))
print((" " * lvl)+"label: "+ " . ".join(dnstr))
else:
raise Exception("invalid label type {}".format(type(label)))
def parse_rrs(rrs, lvl):
for rr in rrs:
print((" " * lvl)+"rr:")
lvl+=2
if len(rr) and isinstance(rr[0], bool):
print((" " * lvl)+"incomplete/broken DNS RR, no support for these yet")
continue
parse_label(rr.pop(0), lvl)
bits = 0
if isinstance(rr[0], CBORSimpleValue):
bits = rr.pop(0).value
print((" " * lvl)+"type (0): "+("yes" if bits & 1 else "no"))
print((" " * lvl)+"class (1): "+("yes" if bits & 1<<1 else "no"))
print((" " * lvl)+"ttl (2): "+("yes" if bits & 1<<2 else "no"))
print((" " * lvl)+"rdlength(3): "+("yes" if bits & 1<<3 else "no"))
rr_type = None
rr_class = None
rr_ttl = None
rdlength = None
if not bits:
if len(rr) > 4:
bits = 0xff
elif len(rr) > 1:
raise Exception("invalid rr, expected none (0) or all (4) optional values but got {}".format(len(rr)-1))
if bits & 1:
if not isinstance(rr[0], int):
raise Exception("invalid rr.type, expected int but got: {}".format(type(rr[0])))
rr_type = rr.pop(0)
if bits & 1<<1:
if not isinstance(rr[0], int):
raise Exception("invalid rr.class, expected int but got: {}".format(type(rr[0])))
rr_class = rr.pop(0)
if bits & 1<<2:
if not isinstance(rr[0], int):
raise Exception("invalid rr.ttl, expected int but got: {}".format(type(rr[0])))
rr_ttl = rr.pop(0)
if bits & 1<<3:
if not isinstance(rr[0], int):
raise Exception("invalid rr.rdlength, expected int but got: {}".format(type(rr[0])))
rdlength = rr.pop(0)
if not rr_type:
rr_type = last.rr_type
if not rr_class:
rr_class = last.rr_class
if not rr_ttl:
rr_ttl = last.rr_ttl
print((" " * lvl)+"type: {}".format(rr_type))
print((" " * lvl)+"class: {}".format(rr_class))
print((" " * lvl)+"ttl: {}".format(rr_ttl))
if rdlength:
print((" " * lvl)+"rdlength: {}".format(rdlength))
if rr_type != 41:
last.rr_type = rr_type
last.rr_class = rr_class
last.rr_ttl = rr_ttl
if isinstance(rr[0], bytes):
print((" " * lvl)+"rdata: "+"".join("{:02x}".format(byte) for byte in rr.pop(0)))
elif isinstance(rr[0], list):
rdata = []
for i in rr.pop(0):
if isinstance(i, int) and i < 0:
i = get_rlabel(i)
elif not isinstance(i, bytes):
add_rlabel(i)
if isinstance(i, bytes):
rdata.append("".join("{:02x}".format(byte) for byte in i))
elif isinstance(i, list):
dn = list(i)
dnstr = []
seen_mlabel = {}
while len(dn):
while isinstance(dn[0], int):
if dn[0] in seen_mlabel:
dn = [ "{ name compression loop }" ]
break
seen_mlabel[dn[0]] = 1
dn = list(last.mlabel[dn[0]])
dnstr.append(dn.pop(0))
rdata.append("[ clabel: {} label: ".format(i) + " . ".join(dnstr) + " ]")
else:
raise Exception("invalid rr.rdata[], expected bytes|list but got: {}".format(type(i)))
print((" " * lvl)+"rdata: "+" ".join(rdata))
else:
raise Exception("invalid rr.rdata, expected bytes|list but got: {}".format(type(rr[0])))
lvl-=2
def parse_qrs(qrs, lvl):
for qr in qrs:
print((" " * lvl)+"qr:")
lvl+=2
parse_label(qr.pop(0), lvl)
rr_type = None
rr_class = None
if len(qr):
if not isinstance(qr[0], int):
raise Exception("invalid qr.type|class, expected int but got {}".format(type(qr[0])))
if qr[0] > -1:
rr_type = qr.pop(0)
if len(qr):
if not isinstance(qr[0], int):
raise Exception("invalid qr.class, expected int but got {}".format(type(qr[0])))
elif not qr[0] < 0:
raise Exception("invalid qr.class, expected negative int but got positive")
rr_class = -qr.pop(0) - 1
else:
rr_class = -qr.pop(0) - 1
if not rr_type:
rr_type = last.rr_type
if not rr_class:
rr_class = last.rr_class
print((" " * lvl)+"type: {}".format(rr_type))
print((" " * lvl)+"class: {}".format(rr_class))
if rr_type != 41:
last.rr_type = rr_type
last.rr_class = rr_class
lvl-=2
def parse_dns_message(dns, lvl):
print((" " * lvl)+"dns:")
lvl+=2
if isinstance(dns[0], bool):
print((" " * lvl)+"incomplete/broken DNS packet, no support for these yet")
return
print((" " * lvl)+"header:")
lvl+=2
id = dns.pop(0)
print((" " * lvl)+"id: {}".format(id))
raw = dns.pop(0)
print((" " * lvl)+"raw: 0x{:04x}".format(raw))
lvl+=2
print((" " * lvl)+" QR: "+("yes" if raw & 1<<15 else "no"))
print((" " * lvl)+"Opcode: {}".format(((raw >> 11) & 0xf)))
print((" " * lvl)+" AA: "+("yes" if raw & 1<<10 else "no"))
print((" " * lvl)+" TC: "+("yes" if raw & 1<<9 else "no"))
print((" " * lvl)+" RD: "+("yes" if raw & 1<<8 else "no"))
print((" " * lvl)+" RA: "+("yes" if raw & 1<<7 else "no"))
print((" " * lvl)+" Z: "+("yes" if raw & 1<<6 else "no"))
print((" " * lvl)+" AD: "+("yes" if raw & 1<<5 else "no"))
print((" " * lvl)+" CD: "+("yes" if raw & 1<<4 else "no"))
print((" " * lvl)+" RCODE: {}".format(raw & 0xf))
lvl-=2
bits = 0
if isinstance(dns[0], int) and dns[0] < 0:
bits = -dns.pop(0) - 1
print((" " * lvl)+"qdcount(0): "+("yes" if bits & 1 else "no"))
print((" " * lvl)+"ancount(1): "+("yes" if bits & 1<<1 else "no"))
print((" " * lvl)+"nscount(2): "+("yes" if bits & 1<<2 else "no"))
print((" " * lvl)+"arcount(3): "+("yes" if bits & 1<<3 else "no"))
if not bits:
if isinstance(dns[0], int):
bits = 0xff
if bits & 1:
if not isinstance(dns[0], int):
raise Exception("invalid dns.header.qdcount, expected int but got: {}".format(type(dns[0])))
print((" " * lvl)+"qdcount: {}".format(dns.pop(0)))
if bits & 1<<1:
if not isinstance(dns[0], int):
raise Exception("invalid dns.header.ancount, expected int but got: {}".format(type(dns[0])))
print((" " * lvl)+"ancount: {}".format(dns.pop(0)))
if bits & 1<<2:
if not isinstance(dns[0], int):
raise Exception("invalid dns.header.nscount, expected int but got: {}".format(type(dns[0])))
print((" " * lvl)+"nscount: {}".format(dns.pop(0)))
if bits & 1<<3:
if not isinstance(dns[0], int):
raise Exception("invalid dns.header.arcount, expected int but got: {}".format(type(dns[0])))
print((" " * lvl)+"arcount: {}".format(dns.pop(0)))
bits = 0
if isinstance(dns[0], CBORSimpleValue):
bits = dns.pop(0).value
print((" " * lvl)+"questions (0): "+("yes" if bits & 1 else "no"))
print((" " * lvl)+"answers (1): "+("yes" if bits & 1<<1 else "no"))
print((" " * lvl)+"authorities(2): "+("yes" if bits & 1<<2 else "no"))
print((" " * lvl)+"additionals(3): "+("yes" if bits & 1<<3 else "no"))
last.mlabel = []
rlabel = list(last.rlabel)
for n in range(4):
if len(dns) > n and isinstance(dns[n], list):
build_mlabel(dns[n])
last.rlabel = rlabel
if not bits:
if len(dns) > 3:
bits = 0xff
elif len(dns) > 0:
raise Exception("invalid dns.message rr's, expected none (0) or all (4) but got {}".format(len(dns)))
if bits & 1:
if not isinstance(dns[0], list):
raise Exception("invalid dns.message.questions, expected list but got: {}".format(type(dns[0])))
print((" " * lvl)+"questions:")
parse_qrs(dns.pop(0), lvl+2)
if bits & 1<<1:
if not isinstance(dns[0], list):
raise Exception("invalid dns.message.answers, expected list but got: {}".format(type(dns[0])))
print((" " * lvl)+"answers:")
parse_rrs(dns.pop(0), lvl+2)
if bits & 1<<2:
if not isinstance(dns[0], list):
raise Exception("invalid dns.message.authorities, expected list but got: {}".format(type(dns[0])))
print((" " * lvl)+"authorities:")
parse_rrs(dns.pop(0), lvl+2)
if bits & 1<<3:
if not isinstance(dns[0], list):
raise Exception("invalid dns.message.additionals, expected list but got: {}".format(type(dns[0])))
print((" " * lvl)+"additionals:")
parse_rrs(dns.pop(0), lvl+2)
if len(dns):
if isinstance(dns[0], bytes):
print((" " * lvl)+"malformed: "+"".join("{:02x}".format(byte) for byte in dns.pop(0)))
if len(dns):
raise Exception("invalid dns.message, garbage at end: {}".format(dns))
def parse_ip_header(ip_header, lvl):
print((" " * lvl)+"ip_header:")
lvl+=2
print((" " * lvl)+"bits:")
lvl+=2
bits = ip_header.pop(0)
reverse = False
if isinstance(bits, int):
if bits < 0:
print((" " * lvl)+"reverse: yes")
bits = -bits - 1
reverse = True
print((" " * lvl)+"family (0): "+("INET6" if bits & 1 else "INET"))
print((" " * lvl)+"have_src (1): "+("yes" if bits & 1<<1 else "no"))
print((" " * lvl)+"have_dest(2): "+("yes" if bits & 1<<2 else "no"))
print((" " * lvl)+"have_port(3): "+("yes" if bits & 1<<3 else "no"))
else:
raise Exception("invalid ip_header.bits, expected int but got: {}".format(type(bits)))
lvl-=2
src_addr = None
dest_addr = None
src_port = None
dest_port = None
if bits & 1<<1:
src_addr = ip_header.pop(0)
if not isinstance(src_addr, bytes):
raise Exception("invalid ip_header.src_addr, expected bytes but got: {}".format(type(src_addr)))
else:
if reverse:
src_addr = last.dest_addr6 if bits & 1 else last.dest_addr4
if not src_addr:
raise Exception("invalid ip_header.bits, expected to have last dest addr but don't")
else:
src_addr = last.src_addr6 if bits & 1 else last.src_addr4
if not src_addr:
raise Exception("invalid ip_header.bits, expected to have last src addr but don't")
if bits & 1<<2:
dest_addr = ip_header.pop(0)
if not isinstance(dest_addr, bytes):
raise Exception("invalid ip_header.dest_addr, expected bytes but got: {}".format(type(dest_addr)))
else:
if reverse:
dest_addr = last.src_addr6 if bits & 1 else last.src_addr4
if not dest_addr:
raise Exception("invalid ip_header.bits, expected to have last src addr but don't")
else:
dest_addr = last.dest_addr6 if bits & 1 else last.dest_addr4
if not dest_addr:
raise Exception("invalid ip_header.bits, expected to have last dest addr but don't")
if bits & 1<<3:
ports = ip_header.pop(0)
if not isinstance(ports, int):
raise Exception("invalid ip_header.src_dest_port, expected int but got: {}".format(type(ports)))
if ports > 0xffff:
src_port = ports & 0xffff
dest_port = ports >> 16
elif ports < 0:
if reverse:
src_port = last.dest_port6 if bits & 1 else last.dest_port4
if src_port is None:
raise Exception("invalid ip_header.bits, expected to have last dest port but don't")
else:
src_port = last.src_port6 if bits & 1 else last.src_port4
if src_port is None:
raise Exception("invalid ip_header.bits, expected to have last src port but don't")
dest_port = -ports - 1
else:
src_port = ports
if reverse:
dest_port = last.src_port6 if bits & 1 else last.src_port4
if dest_port is None:
raise Exception("invalid ip_header.bits, expected to have last src port but don't")
else:
dest_port = last.dest_port6 if bits & 1 else last.dest_port4
if dest_port is None:
raise Exception("invalid ip_header.bits, expected to have last dest port but don't")
else:
if reverse:
src_port = last.dest_port6 if bits & 1 else last.dest_port4
if src_port is None:
raise Exception("invalid ip_header.bits, expected to have last dest port but don't")
else:
src_port = last.src_port6 if bits & 1 else last.src_port4
if src_port is None:
raise Exception("invalid ip_header.bits, expected to have last src port but don't")
if reverse:
dest_port = last.src_port6 if bits & 1 else last.src_port4
if dest_port is None:
raise Exception("invalid ip_header.bits, expected to have last src port but don't")
else:
dest_port = last.dest_port6 if bits & 1 else last.dest_port4
if dest_port is None:
raise Exception("invalid ip_header.bits, expected to have last dest port but don't")
print((" " * lvl)+" src addr: " + socket.inet_ntop(socket.AF_INET6 if bits & 1 else socket.AF_INET, src_addr))
print((" " * lvl)+"dest addr: " + socket.inet_ntop(socket.AF_INET6 if bits & 1 else socket.AF_INET, dest_addr))
print((" " * lvl)+" src port: {}".format(src_port))
print((" " * lvl)+"dest port: {}".format(dest_port))
if bits & 1:
last.src_addr6 = src_addr
last.dest_addr6 = dest_addr
last.src_port6 = src_port
last.dest_port6 = dest_port
else:
last.src_addr4 = src_addr
last.dest_addr4 = dest_addr
last.src_port4 = src_port
last.dest_port4 = dest_port
def parse_message_bits(bits, lvl):
print((" " * lvl)+"message_bits:")
lvl+=2
dns = "no"
if isinstance(bits, int):
if bits & 1:
dns = "yes"
print((" " * lvl)+"dns (0): "+dns)
if bits & 1<<1:
proto = "tcp"
elif dns == "yes":
proto = "udp"
else:
proto = "icmp"
print((" " * lvl)+"proto (1): "+proto)
if bits & 1<<2:
frag = "yes"
else:
frag = "no"
print((" " * lvl)+"frag (2): "+frag)
if bits & 1<<3:
malformed = "yes"
else:
malformed = "no"
print((" " * lvl)+"malformed(3): "+malformed)
else:
raise Exception("invalid message_bits, expected int but got: {}".format(type(bits)))
return 1 if dns == "yes" else 0
def parse_timestamp(ts, lvl):
print((" " * lvl)+"timestamp:")
lvl+=2
if isinstance(ts, list):
if ts[0] < 0:
if not last.ts:
raise Exception("invalid timestamp.seconds, got diff from last value but have no last value")
if not len(last.ts) == len(ts):
raise Exception("invalid timestamp.seconds, differentialy precision missmatch")
ts[0] = last.ts[0] + ( -ts[0] - 1 )
print((" " * lvl)+"seconds: {}".format(ts[0]))
if len(ts) > 1:
ts[1] = last.ts[1] + ts[1]
print((" " * lvl)+"useconds: {}".format(ts[1]))
if len(ts) > 2:
ts[2] = last.ts[2] + ts[2]
print((" " * lvl)+"nseconds: {}".format(ts[2]))
else:
print((" " * lvl)+"seconds: {}".format(ts[0]))
if len(ts) > 1:
print((" " * lvl)+"useconds: {}".format(ts[1]))
if len(ts) > 2:
print((" " * lvl)+"nseconds: {}".format(ts[2]))
last.ts = ts
elif isinstance(ts, int):
print((" " * lvl)+"seconds: {}".format(ts))
else:
raise Exception("invalid timestamp, expected list|int but got: {}".format(type(ts)))
def parse(cds):
print("paket:")
try:
parse_timestamp(cds.pop(0), 2)
is_dns = parse_message_bits(cds.pop(0), 2)
parse_ip_header(cds, 2)
if not is_dns:
raise Exception("not dns? huh?")
parse_dns_message(cds, 2)
except IndexError as idx:
if not str(idx) == "pop from empty list":
raise
print(" ...")
except:
raise
def main():
usage = '%prog [-v] [-h] <cds file...>'
parser = optparse.OptionParser(usage, version='%prog 0.01')
parser.add_option('-v', '--verbose', action='store_true', dest='verbose',
help='turn verbose mode on')
(options, args) = parser.parse_args()
if options.verbose == True:
log.setLevel(logging.DEBUG)
log.debug('argv: %s', sys.argv)
log.debug('options: %s', options)
log.debug('args: %s', args)
else:
log.setLevel(logging.WARNING)
if not args:
parser.print_usage()
exit(1)
decoder = CBORDecoder()
# if https://github.com/agronholm/cbor2/pull/5 is not merged/released yet
if 0 not in decoder.special_decoders:
decoder.special_decoders[0] = lambda self, fp, shareable_index=None: SimpleValue(0)
decoder.special_decoders[1] = lambda self, fp, shareable_index=None: SimpleValue(1)
decoder.special_decoders[2] = lambda self, fp, shareable_index=None: SimpleValue(2)
decoder.special_decoders[3] = lambda self, fp, shareable_index=None: SimpleValue(3)
decoder.special_decoders[4] = lambda self, fp, shareable_index=None: SimpleValue(4)
decoder.special_decoders[5] = lambda self, fp, shareable_index=None: SimpleValue(5)
decoder.special_decoders[6] = lambda self, fp, shareable_index=None: SimpleValue(6)
decoder.special_decoders[7] = lambda self, fp, shareable_index=None: SimpleValue(7)
decoder.special_decoders[8] = lambda self, fp, shareable_index=None: SimpleValue(8)
decoder.special_decoders[9] = lambda self, fp, shareable_index=None: SimpleValue(9)
decoder.special_decoders[10] = lambda self, fp, shareable_index=None: SimpleValue(10)
decoder.special_decoders[11] = lambda self, fp, shareable_index=None: SimpleValue(11)
decoder.special_decoders[12] = lambda self, fp, shareable_index=None: SimpleValue(12)
decoder.special_decoders[13] = lambda self, fp, shareable_index=None: SimpleValue(13)
decoder.special_decoders[14] = lambda self, fp, shareable_index=None: SimpleValue(14)
decoder.special_decoders[15] = lambda self, fp, shareable_index=None: SimpleValue(15)
decoder.special_decoders[16] = lambda self, fp, shareable_index=None: SimpleValue(16)
decoder.special_decoders[17] = lambda self, fp, shareable_index=None: SimpleValue(17)
decoder.special_decoders[18] = lambda self, fp, shareable_index=None: SimpleValue(18)
decoder.special_decoders[19] = lambda self, fp, shareable_index=None: SimpleValue(19)
decoder.special_decoders[24] = decode_simple_value
version = None
for f in args:
log.debug('file: %s', f)
with open(f, 'rb') as fp:
obj = None
try:
obj = decoder.decode(fp)
except Exception as e:
if e.__str__().find("index out of range") == -1:
raise
if not isinstance(obj, list):
raise Exception("Invalid element, expected an array but found: {}".format(type(obj)))
version = obj.pop(0)
if version != "CDSv1":
raise Exception("Invalid version, expected CDSv1 but got: {}".format(version))
while len(obj):
opt = obj.pop(0)
if not isinstance(opt, int):
raise Exception("Invalid option, expected int but got: {}".format(type(opt)))
if opt == 0:
MAX_RLABELS = obj.pop(0)
if not isinstance(MAX_RLABELS, int) or MAX_RLABELS < 1:
raise Exception("Invalid option for maximum rlabels, got: {}".format(MAX_RLABELS))
log.debug("Using maximum rlabels {}".format(MAX_RLABELS))
elif opt == 1:
MIN_RLABEL_SIZE = obj.pop(0)
if not isinstance(MIN_RLABEL_SIZE, int) or MIN_RLABEL_SIZE < 1:
raise Exception("Invalid option for minimum rlabel size, got: {}".format(MIN_RLABEL_SIZE))
log.debug("Using minimum rlabel size {}".format(MIN_RLABEL_SIZE))
else:
raise Exception("Unknown option: {}".format(opt))
while True:
obj = None
try:
obj = decoder.decode(fp)
except Exception as e:
if e.__str__().find("index out of range") == -1:
raise
if obj is None:
break
if not isinstance(obj, list):
raise Exception("Invalid element, expected an array but found: {}".format(type(obj)))
parse(obj)
last.reset()
if __name__ == '__main__':
main()
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