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     ("ADMININACTIVE", "ADMININACTIVE"),
  50 )
  51
  52
  53 def days_offset(): return datetime.date.today() + datetime.timedelta(days = settings.EXPIRATION_DAYS_OFFSET)
  54
  55 class MatchPort(models.Model):
  56     port = models.CharField(max_length=24, unique=True)
  57     def __unicode__(self):
  58         return self.port
  59     class Meta:
  60         db_table = u'match_port'
  61
  62 class MatchDscp(models.Model):
  63     dscp = models.CharField(max_length=24)
  64     def __unicode__(self):
  65         return self.dscp
  66     class Meta:
  67         db_table = u'match_dscp'
  68
  69
  70 class ThenAction(models.Model):
  71     action = models.CharField(max_length=60, choices=THEN_CHOICES, verbose_name="Action")
  72     action_value = models.CharField(max_length=255, blank=True, null=True, verbose_name="Action Value")
  73     def __unicode__(self):
  74         ret = "%s:%s" %(self.action, self.action_value)
  75         return ret.rstrip(":")
  76     class Meta:
  77         db_table = u'then_action'
  78
  79 class Route(models.Model):
  80     name = models.SlugField(max_length=128)
  81     applier = models.ForeignKey(User, blank=True, null=True)
  82     source = models.CharField(max_length=32, blank=True, null=True, help_text=u"Network address. Use address/CIDR notation", verbose_name="Source Address")
  83     sourceport = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchSourcePort", verbose_name="Source Port")
  84     destination = models.CharField(max_length=32, help_text=u"Network address. Use address/CIDR notation", verbose_name="Destination Address")
  85     destinationport = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchDestinationPort", verbose_name="Destination Port")
  86     port = models.ManyToManyField(MatchPort, blank=True, null=True, related_name="matchPort", verbose_name="Port" )
  87     dscp = models.ManyToManyField(MatchDscp, blank=True, null=True, verbose_name="DSCP")
  88     fragmenttype = models.CharField(max_length=20, choices=FRAGMENT_CODES, blank=True, null=True, verbose_name="Fragment Type")
  89     icmpcode = models.CharField(max_length=32, blank=True, null=True, verbose_name="ICMP Code")
  90     icmptype = models.CharField(max_length=32, blank=True, null=True, verbose_name="ICMP Type")
  91     packetlength = models.IntegerField(blank=True, null=True, verbose_name="Packet Length")
  92     protocol = models.CharField(max_length=32, blank=True, null=True, verbose_name="Protocol")
  93     tcpflag = models.CharField(max_length=128, blank=True, null=True, verbose_name="TCP flag")
  94     then = models.ManyToManyField(ThenAction, verbose_name="Then")
  95     filed = models.DateTimeField(auto_now_add=True)
  96     last_updated = models.DateTimeField(auto_now=True)
  97     status = models.CharField(max_length=20, choices=ROUTE_STATES, blank=True, null=True, verbose_name="Status", default="PENDING")
  98 #    is_online = models.BooleanField(default=False)
  99 #    is_active = models.BooleanField(default=False)
 100     expires = models.DateField(default=days_offset, blank=True, null=True,)
 101     response = models.CharField(max_length=512, blank=True, null=True)
 102     comments = models.TextField(null=True, blank=True, verbose_name="Comments")
 103
 104
 105     def __unicode__(self):
 106         return self.name
 107
 108     class Meta:
 109         db_table = u'route'
 110         verbose_name = "Rule"
 111         verbose_name_plural = "Rules"
 112
 113     def save(self, *args, **kwargs):
 114         if not self.pk:
 115             hash = id_gen()
 116             self.name = "%s_%s" %(self.name, hash)
 117         super(Route, self).save(*args, **kwargs) # Call the "real" save() method.
 118
 119
 120     def clean(self, *args, **kwargs):
 121         from django.core.exceptions import ValidationError
 122         if self.destination:
 123             try:
 124                 address = IPNetwork(self.destination)
 125                 self.destination = address.exploded
 126             except Exception:
 127                 raise ValidationError('Invalid network address format at Destination Field')
 128         if self.source:
 129             try:
 130                 address = IPNetwork(self.source)
 131                 self.source = address.exploded
 132             except Exception:
 133                 raise ValidationError('Invalid network address format at Source Field')
 134
 135     def commit_add(self, *args, **kwargs):
 136         peer = self.applier.get_profile().peer.domain_name
 137         send_message("[%s] Adding route %s. Please wait..." %(self.applier.username, self.name), peer)
 138         response = add.delay(self)
 139         logger.info("Got add job id: %s" %response)
 140
 141     def commit_edit(self, *args, **kwargs):
 142         peer = self.applier.get_profile().peer.domain_name
 143         send_message("[%s] Editing route %s. Please wait..." %(self.applier.username, self.name), peer)
 144         response = edit.delay(self)
 145         logger.info("Got edit job id: %s" %response)
 146
 147     def commit_delete(self, *args, **kwargs):
 148         reason_text = ''
 149         reason = ''
 150         if "reason" in kwargs:
 151             reason = kwargs['reason']
 152             reason_text = "Reason: %s. " %reason
 153         peer = self.applier.get_profile().peer.domain_name
 154         send_message("[%s] Removing route %s. %sPlease wait..." %(self.applier.username, self.name, reason_text), peer)
 155         response = delete.delay(self, reason=reason)
 156         logger.info("Got delete job id: %s" %response)
 157
 158     def has_expired(self):
 159         today = datetime.date.today()
 160         if today > self.expires:
 161             return True
 162         return False
 163
 164     def check_sync(self):
 165         if not self.is_synced():
 166             self.status = "OUTOFSYNC"
 167             self.save()
 168
 169     def is_synced(self):
 170         found = False
 171         get_device = PR.Retriever()
 172         device = get_device.fetch_device()
 173         try:
 174             routes = device.routing_options[0].routes
 175         except Exception as e:
 176             self.status = "EXPIRED"
 177             self.save()
 178             logger.error("No routing options on device. Exception: %s" %e)
 179             return True
 180         for route in routes:
 181             if route.name == self.name:
 182                 found = True
 183                 logger.info('Found a matching route name')
 184                 devicematch = route.match
 185                 try:
 186                     assert(self.destination)
 187                     assert(devicematch['destination'][0])
 188                     if self.destination == devicematch['destination'][0]:
 189                         found = found and True
 190                         logger.info('Found a matching destination')
 191                     else:
 192                         found = False
 193                         logger.info('Destination fields do not match')
 194                 except:
 195                     pass
 196                 try:
 197                     assert(self.source)
 198                     assert(devicematch['source'][0])
 199                     if self.source == devicematch['source'][0]:
 200                         found = found and True
 201                         logger.info('Found a matching source')
 202                     else:
 203                         found = False
 204                         logger.info('Source fields do not match')
 205                 except:
 206                     pass
 207                 try:
 208                     assert(self.fragmenttype)
 209                     assert(devicematch['fragment'][0])
 210                     if self.fragmenttype == devicematch['fragment'][0]:
 211                         found = found and True
 212                         logger.info('Found a matching fragment type')
 213                     else:
 214                         found = False
 215                         logger.info('Fragment type fields do not match')
 216                 except:
 217                     pass
 218                 try:
 219                     assert(self.icmpcode)
 220                     assert(devicematch['icmp-code'][0])
 221                     if self.icmpcode == devicematch['icmp-code'][0]:
 222                         found = found and True
 223                         logger.info('Found a matching icmp code')
 224                     else:
 225                         found = False
 226                         logger.info('Icmp code fields do not match')
 227                 except:
 228                     pass
 229                 try:
 230                     assert(self.icmptype)
 231                     assert(devicematch['icmp-type'][0])
 232                     if self.icmptype == devicematch['icmp-type'][0]:
 233                         found = found and True
 234                         logger.info('Found a matching icmp type')
 235                     else:
 236                         found = False
 237                         logger.info('Icmp type fields do not match')
 238                 except:
 239                     pass
 240                 try:
 241                     assert(self.protocol)
 242                     assert(devicematch['protocol'][0])
 243                     if self.protocol == devicematch['protocol'][0]:
 244                         found = found and True
 245                         logger.info('Found a matching protocol')
 246                     else:
 247                         found = False
 248                         logger.info('Protocol fields do not match')
 249                 except:
 250                     pass
 251                 if found and self.status != "ACTIVE":
 252                      logger.error('Rule is applied on device but appears as offline')
 253                      self.status = "ACTIVE"
 254                      self.save()
 255                      found = True
 256                 if not found and self.status == "ADMININACTIVE":
 257                      found = True
 258         return found
 259
 260     def get_then(self):
 261         ret = ''
 262         then_statements = self.then.all()
 263         for statement in then_statements:
 264             if statement.action_value:
 265                 ret = "%s %s:<strong>%s</strong><br/>" %(ret, statement.action, statement.action_value)
 266             else:
 267                 ret = "%s %s<br>" %(ret, statement.action)
 268         return ret.rstrip(',')
 269
 270     get_then.short_description = 'Then statement'
 271     get_then.allow_tags = True
 272 #
 273     def get_match(self):
 274         ret = ''
 275         if self.destination:
 276             ret = '%s Dst Addr:<strong>%s</strong><br/>' %(ret, self.destination)
 277         if self.fragmenttype:
 278             ret = "%s Fragment Type:<strong>%s</strong><br/>" %(ret, self.fragmenttype)
 279         if self.icmpcode:
 280             ret = "%s ICMP code:<strong>%s</strong><br/>" %(ret, self.icmpcode)
 281         if self.icmptype:
 282             ret = "%s ICMP Type:<strong>%s</strong><br/>" %(ret, self.icmptype)
 283         if self.packetlength:
 284             ret = "%s Packet Length:<strong>%s</strong><br/>" %(ret, self.packetlength)
 285         if self.protocol:
 286             ret = "%s Protocol:<strong>%s</strong><br/>" %(ret, self.protocol)
 287         if self.source:
 288             ret = "%s Src Addr:<strong>%s</strong><br/>" %(ret, self.source)
 289         if self.tcpflag:
 290             ret = "%s TCP flag:<strong>%s</strong><br/>" %(ret, self.tcpflag)
 291         if self.port:
 292             for port in self.port.all():
 293                     ret = ret + "Port:<strong>%s</strong><br/>" %(port)
 294         if self.destinationport:
 295             for port in self.destinationport.all():
 296                     ret = ret + "Dst Port:<strong>%s</strong><br/>" %(port)
 297         if self.sourceport:
 298             for port in self.sourceport.all():
 299                     ret = ret +"Src Port:<strong>%s</strong><br/>" %(port)
 300         if self.dscp:
 301             for dscp in self.dscp.all():
 302                     ret = ret + "%s Port:<strong>%s</strong><br/>" %(ret, dscp)
 303         return ret.rstrip('<br/>')
 304
 305     get_match.short_description = 'Match statement'
 306     get_match.allow_tags = True
 307
 308     @property
 309     def applier_peer(self):
 310         try:
 311             applier_peer = self.applier.get_profile().peer
 312         except:
 313             applier_peer = None
 314         return applier_peer
 315
 316 def send_message(msg, user):
 317 #    username = user.username
 318     peer = user
 319     b = beanstalkc.Connection()
 320     b.use(settings.POLLS_TUBE)
 321     tube_message = json.dumps({'message': str(msg), 'username':peer})
 322     b.put(tube_message)
 323     b.close()