Merge remote branch 'snmp_users/master'

9 files changed, 232 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.pyc
diff --git a/modules/people/README.md b/modules/people/README.md
new file mode 100644
index 00000000..d28100d3
--- /dev/null
+++ b/modules/people/README.md
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+SNMP Users
+==========
+
+asks an snmp-router for its arp-list and tries to verify this list via
+ARPING. The snmping is done via snmp-net and command line parsing,
+the arping uses 'scapy'.
+
+This script needs superuser rights and otherwise will just skip the
+verification
+
+SNMPWALK Command
+===============
+
+snmpwalk -c shammunity 10.42.0.1 1.3.6.1.2.1.3.1.1.2
diff --git a/modules/people/TODO.md b/modules/people/TODO.md
new file mode 100644
index 00000000..dfefa9a0
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+++ b/modules/people/TODO.md
@@ -0,0 +1,4 @@
+BUGS
+=====
+- an exception is thrown but handled wrong when snmp servers and arping is
+  unreachable
diff --git a/modules/people/VERSION b/modules/people/VERSION
new file mode 100644
index 00000000..6c50e659
--- /dev/null
+++ b/modules/people/VERSION
@@ -0,0 +1 @@
++++++++[>+++++++>+++++++<<-]>.>---.<-.
diff --git a/modules/people/bin/run.sh b/modules/people/bin/run.sh
new file mode 100755
index 00000000..6da3d059
--- /dev/null
+++ b/modules/people/bin/run.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+echo basedir $0
+BINDIR="`dirname $0`/../src"
+
+python2 "$BINDIR/main.py" $@
diff --git a/modules/people/conf/example.json b/modules/people/conf/example.json
new file mode 100644
index 00000000..f34c20f0
--- /dev/null
+++ b/modules/people/conf/example.json
@@ -0,0 +1,22 @@
+{
+  "snmp_users": {
+    "amqp": {
+      "connection": {
+        "login": "guest",
+        "password": "guest",
+        "host": "localhost"
+      },
+      "out": {
+        "exchange": "snmp_src"
+      }
+    },
+    "snmp": {
+      "server": "127.0.0.1",
+      "community": "community"
+    },
+    "arping": {
+      "active": true,
+      "dev": "eth0"
+    }
+  }
+}
diff --git a/modules/people/src/arping.py b/modules/people/src/arping.py
new file mode 100644
index 00000000..11fb81a9
--- /dev/null
+++ b/modules/people/src/arping.py
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+#!/usr/bin/python2
+
+import logging 
+log = logging.getLogger('arpingy')
+import os
+try:
+  if (os.geteuid() != 0):
+    raise Exception('no root permissions')
+  from scapy.all import * #might throws "no such module"
+
+  def arpingy(iprange="10.42.1.0/24",iface='eth0'):
+    log.debug("pinging "+ str(iprange))
+    """Arping function takes IP Address or Network, returns nested mac/ip list"""
+    try:
+      conf.verb=0
+      ans,unans=arping(iprange,iface=iface,timeout=1)
+
+      collection = []
+      for snd, rcv in ans:
+        result = rcv.sprintf(r"%ARP.psrc% %Ether.src%").split()
+        log.debug(result)
+        return result # take just the first arp reply
+    except Exception as e:
+      print ("something went wrong while arpinging " + str(e))
+    return []
+
+except Exception as e:
+  log.error("Cannot load arping functions!" + str(e))
+  def arpingy(iprange='',iface=''):
+    raise Exception ('arping not available')
diff --git a/modules/people/src/main.py b/modules/people/src/main.py
new file mode 100755
index 00000000..c70bffd4
--- /dev/null
+++ b/modules/people/src/main.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python2
+import sys,json,time
+from snmp_users import snmp_users
+import logging
+import genericore as gen
+MODULE_NAME='snmp_users'
+log = logging.getLogger(MODULE_NAME)
+PROTO_VERSION = 1
+DESCRIPTION = 'performes statistical analysis against mails from stream'
+
+
+# set up instances of needed modules
+conf = gen.Configurator(PROTO_VERSION,DESCRIPTION)  
+amqp = gen.auto_amqp(MODULE_NAME)   
+s = snmp_users(MODULE_NAME)       # the magic mail parsing class
+
+conf.configure([amqp,s]) #set up parser and eval parsed stuff
+
+# start network connections
+amqp.create_connection()
+
+log.info('Starting up snmp_users')
+print ' Sending Messages in Intervals. To exit press CTRL+C'
+try:
+  while True:
+    log.info("collecting data from network")
+    ret = s.collect()
+    data = { 'type' : 'snmp', 'subtype' : 0, 'data' : ret}
+    log.debug("writing data to queue : %s" % data)
+    amqp.publish(json.dumps(data))
+    time.sleep(s.repeat)
+except Exception as e:
+  print "something happened :( " + str(e)
diff --git a/modules/people/src/snmp_users.py b/modules/people/src/snmp_users.py
new file mode 100755
index 00000000..871ed9dd
--- /dev/null
+++ b/modules/people/src/snmp_users.py
@@ -0,0 +1,122 @@
+#!/usr/bin/python2
+
+import logging, subprocess,re
+from multiprocessing import Pool
+from genericore import Configurable
+from arping import arpingy
+log = logging.getLogger('snmp_users')
+
+DEFAULT_CONFIG= {
+  "snmp" : {
+      "server" : "127.0.0.1",
+      "community" : "community",
+      "tree" : "1.3.6.1.2.1.3.1.1.2"
+    },
+  "arping" : {
+    "active" : True,
+    "dev" : "eth0"
+    }
+}
+
+def arping_helper(dic):
+  return arpingy(**dic)
+
+class snmp_users(Configurable):
+  mac_list = {}
+
+  def __init__(self,MODULE_NAME,config=None):
+    self.NAME=MODULE_NAME
+    newConf = { MODULE_NAME : DEFAULT_CONFIG }
+    Configurable.__init__(self,newConf)
+    self.load_conf(config)
+
+  def call_external(self):
+    """returns an array of lines produced by snmpwalk """
+    conf = self.config[self.NAME]['snmp']
+
+    out = subprocess.Popen(
+        ['snmpwalk',
+          '-v2c',
+          '-c',conf['community'],
+          conf['server'],
+          conf['tree']],
+        stdout=subprocess.PIPE).communicate()[0]
+    return out.split('\n')
+
+  def parse_output(self,output):
+    """ parses output lines produced by snmpwalk """
+    data = []
+    for i in output: 
+      if i == '':
+        continue
+      data.append(re.sub(r'.*\.(\d+\.\d+\.\d+\.\d+) = Hex-STRING: ([ 0-9A-F]*) ', r'\1 : \2',i).split(' : '))
+    data = [ [ip,':'.join(mac.split()).lower()] for ip,mac in data] #sanitize
+
+    return data
+
+  def update_results(self,new):
+    """ Verifies ip and mac via ARP Scan 
+        in addition it adds the correct ip to the mac_list """ 
+    macl = self.mac_list = {}
+    for ip,mac in new: # fill the mac_list
+      if not macl.get(mac,None):
+        macl[mac] = []
+      macl[mac].append(ip)
+    return True
+
+  def verify(self,snmp_data):
+    """ verifies retrieved data where data is an array of arrays where
+    [0] is the ip and [1] is the mac (space-delimited)"""
+    arp_data = self.arping_parallel(snmp_data)
+    self.update_results(arp_data)
+
+  def get_own_addr(self):
+    data = subprocess.Popen(['/sbin/ifconfig',self.config[self.NAME]['arping']['dev']],
+        stdout=subprocess.PIPE).communicate()[0].replace('\n','')
+    return re.sub(r'.*HWaddr ([0-9:A-F]*).*inet addr:([0-9.]*).*' ,r'\1 \2',data).split()
+
+
+  def arping_parallel(self,data):
+    conf = self.config[self.NAME]['arping']
+    if conf['active']:
+      tmp = [ {'iprange':dat[0],'iface':conf['dev']} for dat in data]
+      try:
+        p = Pool(10)
+        ret = filter(lambda x:x , p.map(arping_helper, tmp))
+
+        myip,mymac = self.get_own_addr() #append self to list
+        ret.append([mymac,myip ] )
+        p.terminate()
+        return ret
+      except Exception as e:
+        log.warning("Something happened,falling back to original data: "+ str(e))
+        return data
+
+  def collect(self):
+    output = self.call_external()
+    data = self.parse_output(output)
+    if not data:
+      raise Exception('External tool had not returned any parsable output')
+    log.debug('Got following output from snmpwalk program: ' +str(data))
+    macs = self.verify(data)
+    #self.print_results(self.mac_list)
+    return self.mac_list
+
+  def print_results(self,macs):
+    log.debug('printing results:')
+    print '\n'.join([ mac + " => %s" %
+      str(ips) for mac,ips in macs.items() ])
+    print '%d *unique* nodes in network' % len(macs)
+
+  def populate_parser(self,parser):
+    parser.add_argument('--repeat',type=int,dest='repeat',default=30,help='Seconds between Scans',metavar='SECS') #TODO add this to configuration
+
+  def eval_parser(self,parsed):
+    self.repeat = parsed.repeat
+
+if __name__ == "__main__":
+  logging.basicConfig(level=logging.INFO)
+  a = snmp_users()
+  print a.get_own_addr()
+  a.collect()
+  a.print_results(a.mac_list)