code.grnet.gr Git - flowspy/blob - flowspec/models.py

   1 # -*- coding: utf-8 -*- vim:encoding=utf-8:
   2 # vim: tabstop=4:shiftwidth=4:softtabstop=4:expandtab
   3
   4 from django.db import models
   5 from django.conf import settings
   6 from django.contrib.auth.models import User
   7 from utils import proxy as PR
   8 from ipaddr import *
   9 import datetime
  10 import logging
  11 from flowspec.tasks import *
  12 from time import sleep
  13
  14 from flowspy.utils import beanstalkc
  15 from flowspy.utils.randomizer import id_generator as id_gen
  16
  17
  18 FORMAT = '%(asctime)s %(levelname)s: %(message)s'
  19 logging.basicConfig(format=FORMAT)
  20 logger = logging.getLogger(__name__)
  21 logger.setLevel(logging.DEBUG)
  22
  23
  24 FRAGMENT_CODES = (
  25     ("dont-fragment", "Don't fragment"),
  26     ("first-fragment", "First fragment"),
  27     ("is-fragment", "Is fragment"),
  28     ("last-fragment", "Last fragment"),
  29     ("not-a-fragment", "Not a fragment")
  30 )
  31
  32 THEN_CHOICES = (
  33     ("accept", "Accept"),
  34     ("discard", "Discard"),
  35     ("community", "Community"),
  36     ("next-term", "Next term"),
  37     ("routing-instance", "Routing Instance"),
  38     ("rate-limit", "Rate limit"),
  39     ("sample", "Sample")
  40 )
  41
  42 ROUTE_STATES = (
  43     ("ACTIVE", "ACTIVE"),
  44     ("ERROR", "ERROR"),
  45     ("EXPIRED", "EXPIRED"),
  46     ("PENDING", "PENDING"),
  47     ("OUTOFSYNC", "OUTOFSYNC"),
  48     ("INACTIVE", "INACTIVE"),
  49 )
  50
  51
  52 def days_offset(): return datetime.date.today() + datetime.timedelta(days = settings.EXPIRATION_DAYS_OFFSET)
  53
  54 class MatchPort(models.Model):
  55     port = models.CharField(max_length=24, unique=True)
  56     def __unicode__(self):
  57         return self.port
  58     class Meta:
  59         db_table = u'match_port'
  60
  61 class MatchDscp(models.Model):
  62     dscp = models.CharField(max_length=24)
  63     def __unicode__(self):
  64         return self.dscp
  65     class Meta:
  66         db_table = u'match_dscp'
  67
  68
  69 class ThenAction(models.Model):
  70     action = models.CharField(max_length=60, choices=THEN_CHOICES, verbose_name="Action")
  71     action_value = models.CharField(max_length=255, blank=True, null=True, verbose_name="Action Value")
  72     def __unicode__(self):
  73         ret = "%s:%s" %(self.action, self.action_value)
  74         return ret.rstrip(":")
  75     class Meta:
  76         db_table = u'then_action'
  77
  78 class Route(models.Model):
  79     name = models.SlugField(max_length=128)
  80     applier = models.ForeignKey(User, blank=True, null=True)
  81     source = models.CharField(max_length=32, blank=True, null=True, help_text=u"Network address. Use address/CIDR notation", verbose_name="Source Address")
  82     sourceport = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchSourcePort", verbose_name="Source Port")
  83     destination = models.CharField(max_length=32, help_text=u"Network address. Use address/CIDR notation", verbose_name="Destination Address")
  84     destinationport = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchDestinationPort", verbose_name="Destination Port")
  85     port = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchPort", verbose_name="Port" )
  86     dscp = models.ManyToManyField(MatchDscp, blank=True, null=True, verbose_name="DSCP")
  87     fragmenttype = models.CharField(max_length=20, choices=FRAGMENT_CODES, blank=True, null=True, verbose_name="Fragment Type")
  88     icmpcode = models.CharField(max_length=32, blank=True, null=True, verbose_name="ICMP Code")
  89     icmptype = models.CharField(max_length=32, blank=True, null=True, verbose_name="ICMP Type")
  90     packetlength = models.IntegerField(blank=True, null=True, verbose_name="Packet Length")
  91     protocol = models.CharField(max_length=32, blank=True, null=True, verbose_name="Protocol")
  92     tcpflag = models.CharField(max_length=128, blank=True, null=True, verbose_name="TCP flag")
  93     then = models.ManyToManyField(ThenAction, verbose_name="Then")
  94     filed = models.DateTimeField(auto_now_add=True)
  95     last_updated = models.DateTimeField(auto_now=True)
  96     status = models.CharField(max_length=20, choices=ROUTE_STATES, blank=True, null=True, verbose_name="Status", default="PENDING")
  97 #    is_online = models.BooleanField(default=False)
  98 #    is_active = models.BooleanField(default=False)
  99     expires = models.DateField(default=days_offset, blank=True, null=True,)
 100     response = models.CharField(max_length=512, blank=True, null=True)
 101     comments = models.TextField(null=True, blank=True, verbose_name="Comments")
 102
 103
 104     def __unicode__(self):
 105         return self.name
 106
 107     class Meta:
 108         db_table = u'route'
 109
 110     def save(self, *args, **kwargs):
 111         if not self.pk:
 112             hash = id_gen()
 113             self.name = "%s_%s" %(self.name, hash)
 114         super(Route, self).save(*args, **kwargs) # Call the "real" save() method.
 115
 116
 117     def clean(self, *args, **kwargs):
 118         from django.core.exceptions import ValidationError
 119         if self.destination:
 120             try:
 121                 address = IPNetwork(self.destination)
 122                 self.destination = address.exploded
 123             except Exception:
 124                 raise ValidationError('Invalid network address format at Destination Field')
 125         if self.source:
 126             try:
 127                 address = IPNetwork(self.source)
 128                 self.source = address.exploded
 129             except Exception:
 130                 raise ValidationError('Invalid network address format at Source Field')
 131
 132     def commit_add(self, *args, **kwargs):
 133         peer = self.applier.get_profile().peer.domain_name
 134         send_message("[%s] Adding route %s. Please wait..." %(self.applier.username, self.name), peer)
 135         response = add.delay(self)
 136         logger.info("Got add job id: %s" %response)
 137
 138     def commit_edit(self, *args, **kwargs):
 139         peer = self.applier.get_profile().peer.domain_name
 140         send_message("[%s] Editing route %s. Please wait..." %(self.applier.username, self.name), peer)
 141         response = edit.delay(self)
 142         logger.info("Got edit job id: %s" %response)
 143
 144     def commit_delete(self, *args, **kwargs):
 145         reason_text = ''
 146         if "reason" in kwargs:
 147             reason = kwargs['reason']
 148             reason_text = "Reason: %s. " %reason
 149         peer = self.applier.get_profile().peer.domain_name
 150         send_message("[%s] Removing route %s. %sPlease wait..." %(self.applier.username, self.name, reason), peer)
 151         response = delete.delay(self, reason=reason)
 152         logger.info("Got delete job id: %s" %response)
 153
 154     def has_expired(self):
 155         today = datetime.date.today()
 156         if today > self.expires:
 157             return True
 158         return False
 159
 160     def check_sync(self):
 161         if not self.is_synced():
 162             self.status = "OUTOFSYNC"
 163             self.save()
 164
 165     def is_synced(self):
 166         found = False
 167         get_device = PR.Retriever()
 168         device = get_device.fetch_device()
 169         try:
 170             routes = device.routing_options[0].routes
 171         except Exception as e:
 172             self.status = "EXPIRED"
 173             self.save()
 174             logger.error("No routing options on device. Exception: %s" %e)
 175             return True
 176         for route in routes:
 177             if route.name == self.name:
 178                 found = True
 179                 logger.info('Found a matching route name')
 180                 devicematch = route.match
 181                 try:
 182                     assert(self.destination)
 183                     assert(devicematch['destination'][0])
 184                     if self.destination == devicematch['destination'][0]:
 185                         found = found and True
 186                         logger.info('Found a matching destination')
 187                     else:
 188                         found = False
 189                         logger.info('Destination fields do not match')
 190                 except:
 191                     pass
 192                 try:
 193                     assert(self.source)
 194                     assert(devicematch['source'][0])
 195                     if self.source == devicematch['source'][0]:
 196                         found = found and True
 197                         logger.info('Found a matching source')
 198                     else:
 199                         found = False
 200                         logger.info('Source fields do not match')
 201                 except:
 202                     pass
 203                 try:
 204                     assert(self.fragmenttype)
 205                     assert(devicematch['fragment'][0])
 206                     if self.fragmenttype == devicematch['fragment'][0]:
 207                         found = found and True
 208                         logger.info('Found a matching fragment type')
 209                     else:
 210                         found = False
 211                         logger.info('Fragment type fields do not match')
 212                 except:
 213                     pass
 214                 try:
 215                     assert(self.icmpcode)
 216                     assert(devicematch['icmp-code'][0])
 217                     if self.icmpcode == devicematch['icmp-code'][0]:
 218                         found = found and True
 219                         logger.info('Found a matching icmp code')
 220                     else:
 221                         found = False
 222                         logger.info('Icmp code fields do not match')
 223                 except:
 224                     pass
 225                 try:
 226                     assert(self.icmptype)
 227                     assert(devicematch['icmp-type'][0])
 228                     if self.icmptype == devicematch['icmp-type'][0]:
 229                         found = found and True
 230                         logger.info('Found a matching icmp type')
 231                     else:
 232                         found = False
 233                         logger.info('Icmp type fields do not match')
 234                 except:
 235                     pass
 236                 try:
 237                     assert(self.protocol)
 238                     assert(devicematch['protocol'][0])
 239                     if self.protocol == devicematch['protocol'][0]:
 240                         found = found and True
 241                         logger.info('Found a matching protocol')
 242                     else:
 243                         found = False
 244                         logger.info('Protocol fields do not match')
 245                 except:
 246                     pass
 247                 if found and self.status != "ACTIVE":
 248                      logger.error('Rule is applied on device but appears as offline')
 249                      self.status = "ACTIVE"
 250                      self.save()
 251                      found = True
 252         return found
 253
 254     def get_then(self):
 255         ret = ''
 256         then_statements = self.then.all()
 257         for statement in then_statements:
 258             if statement.action_value:
 259                 ret = "%s %s:<strong>%s</strong><br/>" %(ret, statement.action, statement.action_value)
 260             else:
 261                 ret = "%s %s<br>" %(ret, statement.action)
 262         return ret.rstrip(',')
 263
 264     get_then.short_description = 'Then statement'
 265     get_then.allow_tags = True
 266 #
 267     def get_match(self):
 268         ret = ''
 269         if self.destination:
 270             ret = '%s Dst Addr:<strong>%s</strong><br/>' %(ret, self.destination)
 271         if self.fragmenttype:
 272             ret = "%s Fragment Type:<strong>%s</strong><br/>" %(ret, self.fragmenttype)
 273         if self.icmpcode:
 274             ret = "%s ICMP code:<strong>%s</strong><br/>" %(ret, self.icmpcode)
 275         if self.icmptype:
 276             ret = "%s ICMP Type:<strong>%s</strong><br/>" %(ret, self.icmptype)
 277         if self.packetlength:
 278             ret = "%s Packet Length:<strong>%s</strong><br/>" %(ret, self.packetlength)
 279         if self.protocol:
 280             ret = "%s Protocol:<strong>%s</strong><br/>" %(ret, self.protocol)
 281         if self.source:
 282             ret = "%s Src Addr:<strong>%s</strong><br/>" %(ret, self.source)
 283         if self.tcpflag:
 284             ret = "%s TCP flag:<strong>%s</strong><br/>" %(ret, self.tcpflag)
 285         if self.port:
 286             for port in self.port.all():
 287                     ret = ret + "Port:<strong>%s</strong><br/>" %(port)
 288         if self.destinationport:
 289             for port in self.destinationport.all():
 290                     ret = ret + "Dst Port:<strong>%s</strong><br/>" %(port)
 291         if self.sourceport:
 292             for port in self.sourceport.all():
 293                     ret = ret +"Src Port:<strong>%s</strong><br/>" %(port)
 294         if self.dscp:
 295             for dscp in self.dscp.all():
 296                     ret = ret + "%s Port:<strong>%s</strong><br/>" %(ret, dscp)
 297         return ret.rstrip('<br/>')
 298
 299     get_match.short_description = 'Match statement'
 300     get_match.allow_tags = True
 301
 302 def send_message(msg, user):
 303 #    username = user.username
 304     peer = user
 305     b = beanstalkc.Connection()
 306     b.use(settings.POLLS_TUBE)
 307     tube_message = json.dumps({'message': str(msg), 'username':peer})
 308     b.put(tube_message)
 309     b.close()