def main():
args = sys.argv[1:]
print args
# Default to listening to all devices
nids.param("device", 'any')
nids.param("pcap_filter", ' '.join(args) + ' and tcp')
# disable portscan detection
nids.param("scan_num_hosts", 0)
# disable check-summing
nids.chksum_ctl([('0.0.0.0/0', False)])
nids.init()
(uid, gid) = pwd.getpwnam(NOTROOT)[2:4]
os.setgroups([gid, ])
os.setgid(gid)
os.setuid(uid)
if 0 in [os.getuid(), os.getgid()] + list(os.getgroups()):
print "error - drop root, please!"
sys.exit(1)
nids.register_tcp(handle_tcp)
while True:
try:
nids.next()
except nids.error, e:
print "nids/pcap error:", e
except Exception, e:
self.complete = True
chop.prnt("Error initting: ", e)
return
nids.chksum_ctl([('0.0.0.0/0',False),])
nids.register_tcp(handleTcpStreams)
nids.register_udp(handleUdpDatagrams)
while(True): #This overall while prevents exceptions from halting the long running reading
if self.stopped:
break
try:
if options.longrun: #long running don't stop until the proces is killed externally
while not self.stopped:
if not nids.next():
time.sleep(.001)
else:
while not self.stopped and nids.next():
pass
self.stopped = True #Force it to true and exit
except Exception, e:
if not options.longrun:
self.stopped = True #Force it to true and exit
chop.prnt("Error processing packets", e)
chop.prettyprnt("RED", "Shutting Down Modules ...")
#Call modules shutdown functions to do last-minute actions
for module in all_modules:
class ChopCore(Thread):
def __init__(self, options, module_list, chp, chophelper):
Thread.__init__(self)
self.options = options
self.module_list = module_list
self.chophelper = chophelper
self.stopped = False
self.complete = False
self.abort = False
global chop
chop = chp
def stop(self):
self.complete = True
self.stopped = True
def iscomplete(self):
return self.complete
def getptime(self):
global ptimestamp
return ptimestamp
def getmeta(self):
global metadata
return metadata
def prep_modules(self):
self.chophelper.set_core(self)
modules = self.module_list
for module in modules:
code = module.code
code.chop = self.chophelper.setup_module(code.moduleName)
def run(self):
global chop
#Initialize modules to be run
options = self.options
modules = self.module_list #module_list
module_options = {}
chop.prettyprnt("RED", "Initializing Modules ...")
for module in modules:
name = module.name
arguments = module.arguments #shlex.split(module[1])
code = module.code #module[0]
#Create module_data for all modules
module.module_data = {'args': arguments}
module.streaminfo = {}
chop.prettyprnt("CYAN", "\tInitializing module '" + name + "'")
try:
module_options = code.init(module.module_data)
except Exception, e:
chop.prnt("Error Initializing Module", code.moduleName + ":",
e)
self.complete = True
return
if 'error' in module_options:
chop.prettyprnt(
"GREEN", "\t\t%s init failure: %s" %
(code.moduleName, module_options['error']))
continue
if module.legacy:
if module_options['proto'] == 'tcp':
tcp_modules.append(module)
all_modules.append(module)
module.streaminfo['tcp'] = {}
elif module_options['proto'] == 'ip':
ip_modules.append(module)
all_modules.append(module)
module.streaminfo['ip'] = {}
elif module_options['proto'] == 'udp':
udp_modules.append(module)
all_modules.append(module)
module.streaminfo['udp'] = {}
else:
chop.prnt("Undefined Module Type\n")
self.complete = True
return
else:
all_modules.append(module)
#Proto is an array of dictionaries
if not isinstance(module_options['proto'], list): #Malformed
chop.prnt("%s has malformed proto list" %
module.code.moduleName)
self.complete = True
return
for proto in module_options['proto']:
#Right now (4.0) each dictionary only has one key
#This might change in the future but should be easy
#since it's already a separate dictionary
if type(proto) is not dict:
chop.prnt("%s has malformed proto list" %
module.code.moduleName)
self.complete = True
return
for input in proto.keys():
if input not in module.inputs:
module.inputs[input] = []
if proto[input] != '':
module.inputs[input].append(proto[input])
module.outputs.append(proto[input])
#Initialize the streaminfo array by type
if input != 'any' and input != 'ip':
module.streaminfo[input] = {}
if input == 'tcp':
tcp_modules.append(module)
elif input == 'udp':
udp_modules.append(module)
elif input == 'ip':
ip_modules.append(module)
elif input == 'any': #Special input that catches all non-core types
#Initialize the streaminfo for all parents of the 'any' module
if not len(module.parents):
chop.prettyprnt(
"GREEN",
"WARNING: No Parent for %s to provide data"
% (module.code.moduleName))
else:
for parent in module.parents:
for output in parent.outputs:
module.streaminfo[output] = {}
else: # non-core types, e.g., 'http' or 'dns'
if len(module.parents
): #Make sure parents give it what it wants
for parent in module.parents:
if input not in parent.outputs:
chop.prettyprnt(
"GREEN",
"WARNING: Parent to %s not providing %s data"
% (module.code.moduleName, input))
else:
chop.prettyprnt(
"GREEN",
"WARNING: No Parent for %s providing %s data"
% (module.code.moduleName, input))
if not all_modules:
chop.prnt("No modules")
self.complete = True
return
chop.prettyprnt("RED", "Running Modules ...")
#Actually run the modules
if options['interface']:
nids.param("scan_num_hosts", 0)
nids.param("device", options['interface'])
if options['bpf'] is not None:
nids.param("pcap_filter", options['bpf'])
try:
nids.init()
except Exception, e:
chop.prnt("Error initting on interface: ", e)
self.complete = True
return
nids.chksum_ctl([
('0.0.0.0/0', False),
])
nids.register_tcp(handleTcpStreams)
nids.register_udp(handleUdpDatagrams)
nids.register_ip(handleIpPackets)
while (
True
): #This overall while prevents exceptions from halting the processing of packets
if self.stopped:
break
try:
while not self.stopped:
nids.next()
time.sleep(.001) #XXX is this enough or too much?
except Exception, e:
chop.prnt("Error processing packets", e)
nids.chksum_ctl([
('0.0.0.0/0', False),
])
nids.register_tcp(handleTcpStreams)
nids.register_udp(handleUdpDatagrams)
nids.register_ip(handleIpPackets)
while (
not self.stopped
): #This overall while prevents exceptions from halting the long running reading
try:
if options[
'longrun']: #long running don't stop until the proces is killed externally
while not self.stopped:
if not nids.next():
if self.abort: #exit if sigabrt if no other data
break
time.sleep(.001)
else:
while not self.stopped and nids.next():
pass
self.stopped = True #Force it to true and exit
except Exception, e:
chop.prnt("Error processing packets", e)
if not options['longrun']:
self.stopped = True #Force it to true and exit
raise # only raise if not in longrun
chop.prettyprnt("RED", "Shutting Down Modules ...")
class ChopCore(Thread):
def __init__(self,options, module_list, chp, chophelper):
Thread.__init__(self)
self.options = options
self.module_list = module_list
self.chophelper = chophelper
self.stopped = False
self.complete = False
global chop
chop = chp
def stop(self):
self.complete = True
self.stopped = True
def iscomplete(self):
return self.complete
def getptime(self):
global ptimestamp
return ptimestamp
def getmeta(self):
global metadata
return metadata
def prep_modules(self):
self.chophelper.set_core(self)
modules = self.module_list
for module in modules:
module = module[0]
module.chop = self.chophelper.setup_module(module.moduleName)
def run(self):
global chop
#Initialize modules to be run
options = self.options
modules = self.module_list#module_list
module_options = {}
chop.prettyprnt("RED", "Initializing Modules ...")
for module in modules:
name = module[2]
arguments = shlex.split(module[1])
module = module[0]
#Create module_data for all modules
module.module_data = {'args':arguments}
module.streaminfo = {}
chop.prettyprnt("CYAN", "\tInitializing module '" + name + "'")
try:
module_options = module.init(module.module_data)
except Exception, e:
chop.prnt("Error Initializing Module", module.moduleName + ":", e)
self.complete = True
return
if 'error' in module_options:
chop.prettyprnt("GREEN", "\t\t%s init failure: %s" % (module.moduleName, module_options['error']))
continue
if module_options['proto'] == 'tcp' :
tcp_modules.append(module)
all_modules.append(module)
elif module_options['proto'] == 'ip' :
ip_modules.append(module)
all_modules.append(module)
elif module_options['proto'] == 'udp' :
udp_modules.append(module)
all_modules.append(module)
else:
chop.prnt("Undefined Module Type\n")
self.complete = True
return
if not all_modules:
chop.prnt("No modules")
self.complete = True
return
chop.prettyprnt("RED", "Running Modules ...")
#Actually run the modules
if options['interface']:
nids.param("scan_num_hosts",0)
nids.param("device",options['interface'])
if options['bpf'] is not None:
nids.param("pcap_filter", options['bpf'])
try:
nids.init()
except Exception, e:
chop.prnt("Error initting: ", e)
self.complete = True
return
nids.chksum_ctl([('0.0.0.0/0',False),])
nids.register_tcp(handleTcpStreams)
nids.register_udp(handleUdpDatagrams)
while(True): #This overall while prevents exceptions from halting the processing of packets
if self.stopped:
break
try:
while not self.stopped:
nids.next()
time.sleep(.001) #XXX is this enough or too much?
except Exception, e:
chop.prnt("Error processing packets", e)
nids.param("filename", fn)
nids.param("scan_num_hosts", 0) # disable portscan detection
nids.param("tcp_workarounds", 1)
if filt:
nids.param("pcap_filter", filt)
try:
nids.init()
except nids.error, e:
print "initialization error", e
sys.exit(1)
nids.register_tcp(handleTcp)
for ii in xrange(0, niters):
try:
rc = nids.next()
if rc == 0:
print "nids next returned 0"
except KeyboardInterrupt:
break
print "ldapmsgcount =", ldapmsgcount
print "skipped =", skipcount
print "count =", count
print "pending =", pending
print "euids =", euids
print "opcount =", printcounts()
# scapy stuff
# pkts = PcapReader(fn)
# for pkt in pkts:
