src/nepi/testbeds/netns/metadata_v01.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 from constants import TESTBED_ID
   5 from nepi.core import metadata
   6 from nepi.core.attributes import Attribute
   7 from nepi.util import validation
   8 from nepi.util.constants import STATUS_NOT_STARTED, STATUS_RUNNING, \
   9         STATUS_FINISHED
  10
  11 NODE = "Node"
  12 P2PIFACE = "P2PNodeInterface"
  13 TAPIFACE = "TapNodeInterface"
  14 NODEIFACE = "NodeInterface"
  15 SWITCH = "Switch"
  16 APPLICATION = "Application"
  17
  18 NS3_TESTBED_ID = "ns3"
  19 FDNETDEV = "ns3::FileDescriptorNetDevice"
  20
  21 ### Connection functions ####
  22
  23 def connect_switch(testbed_instance, switch, interface):
  24     switch.connect(interface)
  25
  26 #XXX: This connection function cannot be use to transfer a file descriptor
  27 # to a remote tap device
  28 def connect_fd_local(testbed_instance, tap, fdnd):
  29     import passfd
  30     import socket
  31     fd = tap.file_descriptor
  32     address = fdnd.socket_address
  33     sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
  34     sock.connect(address)
  35     passfd.sendfd(sock, fd, '0')
  36     # TODO: after succesful transfer, the tap device should close the fd
  37
  38 ### Creation functions ###
  39
  40 def create_node(testbed_instance, guid):
  41     parameters = testbed_instance._get_parameters(guid)
  42     forward_X11 = False
  43     if "forward_X11" in parameters:
  44         forward_X11 = parameters["forward_X11"]
  45         del parameters["forward_X11"]
  46     element = testbed_instance.netns.Node(forward_X11 = forward_X11)
  47     testbed_instance.elements[guid] = element
  48
  49 def create_p2piface(testbed_instance, guid):
  50     if guid in testbed_instance.elements:
  51         # The interface pair was already instantiated
  52         return
  53     # search for the node asociated with the p2piface
  54     node1_guid = testbed_instance.get_connected(guid, "node", "devs")
  55     if len(node1_guid) == 0:
  56         raise RuntimeError("Can't instantiate interface %d outside netns \
  57                 node" % guid)
  58     node1 = testbed_instance.elements[node1_guid[0]]
  59     # search for the pair p2piface
  60     p2p_guid = testbed_instance.get_connected(guid, "p2p","p2p")
  61     if len(p2p_guid) == 0:
  62         raise RuntimeError("Can't instantiate p2p interface %d. \
  63                 Missing interface pair" % guid)
  64     guid2 = p2p_guid[0]
  65     node2_guid = testbed_instance.get_connected(guid2, "node", "devs")
  66     if len(node2_guid) == 0:
  67         raise RuntimeError("Can't instantiate interface %d outside netns \
  68                 node" % guid2)
  69     node2 = testbed_instance.elements[node2_guid[0]]
  70     element1, element2 = testbed_instance.netns.P2PInterface.create_pair(
  71         node1, node2)
  72     testbed_instance.elements[guid] = element1
  73     testbed_instance.elements[guid2] = element2
  74
  75 def create_tapiface(testbed_instance, guid):
  76     node_guid = testbed_instance.get_connected(guid, "node", "devs")
  77     if len(node_guid) == 0:
  78         raise RuntimeError("Can't instantiate interface %d outside netns \
  79                 node" % guid)
  80     node = testbed_instance.elements[node_guid[0]]
  81     element = node.add_tap()
  82     testbed_instance.elements[guid] = element
  83
  84 def create_nodeiface(testbed_instance, guid):
  85     node_guid = testbed_instance.get_connected(guid, "node", "devs")
  86     if len(node_guid) == 0:
  87         raise RuntimeError("Can't instantiate interface %d outside netns \
  88                 node" % guid)
  89     node = testbed_instance.elements[node_guid[0]]
  90     element = node.add_if()
  91     testbed_instance.elements[guid] = element
  92
  93 def create_switch(testbed_instance, guid):
  94     element = testbed_instance.netns.Switch()
  95     testbed_instance.elements[guid] = element
  96
  97 def create_application(testbed_instance, guid):
  98     testbed_instance.elements[guid] = None # Delayed construction
  99
 100 ### Start/Stop functions ###
 101
 102 def start_application(testbed_instance, guid):
 103     parameters = testbed_instance._get_parameters(guid)
 104     traces = testbed_instance._get_traces(guid)
 105     user = parameters["user"]
 106     command = parameters["command"]
 107     stdout = stderr = None
 108     if "stdout" in traces:
 109         filename = testbed_instance.trace_filename(guid, "stdout")
 110         stdout = open(filename, "wb")
 111         testbed_instance.follow_trace("stdout", stdout)
 112     if "stderr" in traces:
 113         filename = testbed_instance.trace_filename(guid, "stderr")
 114         stderr = open(filename, "wb")
 115         testbed_instance.follow_trace("stderr", stderr)
 116
 117     node_guid = testbed_instance.get_connected(guid, "node", "apps")
 118     if len(node_guid) == 0:
 119         raise RuntimeError("Can't instantiate interface %d outside netns \
 120                 node" % guid)
 121     node = testbed_instance.elements[node_guid[0]]
 122     element  = node.Popen(command, shell = True, stdout = stdout,
 123             stderr = stderr, user = user)
 124     testbed_instance.elements[guid] = element
 125
 126 ### Status functions ###
 127
 128 def status_application(testbed_instance, guid):
 129     if guid not in testbed_instance.elements.keys():
 130         return STATUS_NOT_STARTED
 131     app = testbed_instance.elements[guid]
 132     if app.poll() == None:
 133         return STATUS_RUNNING
 134     return STATUS_FINISHED
 135
 136 ### Factory information ###
 137
 138 connector_types = dict({
 139     "apps": dict({
 140                 "help": "Connector from node to applications",
 141                 "name": "apps",
 142                 "max": -1,
 143                 "min": 0
 144             }),
 145     "devs": dict({
 146                 "help": "Connector from node to network interfaces",
 147                 "name": "devs",
 148                 "max": -1,
 149                 "min": 0
 150             }),
 151     "node": dict({
 152                 "help": "Connector to a Node",
 153                 "name": "node",
 154                 "max": 1,
 155                 "min": 1
 156             }),
 157     "p2p": dict({
 158                 "help": "Connector to a P2PInterface",
 159                 "name": "p2p",
 160                 "max": 1,
 161                 "min": 0
 162             }),
 163     "fd": dict({
 164                 "help": "Connector to a network interface that can receive a file descriptor",
 165                 "name": "fd",
 166                 "max": 1,
 167                 "min": 0
 168             }),
 169     "switch": dict({
 170                 "help": "Connector to a switch",
 171                 "name": "switch",
 172                 "max": 1,
 173                 "min": 0
 174             })
 175    })
 176
 177 connections = [
 178     dict({
 179         "from": (TESTBED_ID, NODE, "devs"),
 180         "to":   (TESTBED_ID, P2PIFACE, "node"),
 181         "code": None,
 182         "can_cross": False
 183     }),
 184     dict({
 185         "from": (TESTBED_ID, NODE, "devs"),
 186         "to":   (TESTBED_ID, TAPIFACE, "node"),
 187         "code": None,
 188         "can_cross": False
 189     }),
 190     dict({
 191         "from": (TESTBED_ID, NODE, "devs"),
 192         "to":   (TESTBED_ID, NODEIFACE, "node"),
 193         "code": None,
 194         "can_cross": False
 195     }),
 196     dict({
 197         "from": (TESTBED_ID, P2PIFACE, "p2p"),
 198         "to":   (TESTBED_ID, P2PIFACE, "p2p"),
 199         "code": None,
 200         "can_cross": False
 201     }),
 202     dict({
 203         "from": (TESTBED_ID, TAPIFACE, "fd"),
 204         "to":   (NS3_TESTBED_ID, FDNETDEV, "fd"),
 205         "code": connect_fd_local,
 206         "can_cross": True
 207     }),
 208      dict({
 209         "from": (TESTBED_ID, SWITCH, "devs"),
 210         "to":   (TESTBED_ID, NODEIFACE, "switch"),
 211         "code": connect_switch,
 212         "can_cross": False
 213     }),
 214     dict({
 215         "from": (TESTBED_ID, NODE, "apps"),
 216         "to":   (TESTBED_ID, APPLICATION, "node"),
 217         "code": None,
 218         "can_cross": False
 219     })
 220 ]
 221
 222 attributes = dict({
 223     "forward_X11": dict({
 224                 "name": "forward_X11",
 225                 "help": "Forward x11 from main namespace to the node",
 226                 "type": Attribute.BOOL,
 227                 "value": False,
 228                 "flags": Attribute.DesignOnly,
 229                 "validation_function": validation.is_bool
 230             }),
 231     "lladdr": dict({
 232                 "name": "lladdr",
 233                 "help": "Mac address",
 234                 "type": Attribute.STRING,
 235                 "flags": Attribute.DesignOnly,
 236                 "validation_function": validation.is_mac_address
 237             }),
 238     "up": dict({
 239                 "name": "up",
 240                 "help": "Link up",
 241                 "type": Attribute.BOOL,
 242                 "value": False,
 243                 "validation_function": validation.is_bool
 244             }),
 245     "device_name": dict({
 246                 "name": "name",
 247                 "help": "Device name",
 248                 "type": Attribute.STRING,
 249                 "flags": Attribute.DesignOnly,
 250                 "validation_function": validation.is_string
 251             }),
 252     "mtu":  dict({
 253                 "name": "mtu",
 254                 "help": "Maximum transmition unit for device",
 255                 "type": Attribute.INTEGER,
 256                 "validation_function": validation.is_integer
 257             }),
 258     "broadcast": dict({
 259                 "name": "broadcast",
 260                 "help": "Broadcast address",
 261                 "type": Attribute.STRING,
 262                 "validation_function": validation.is_string # TODO: should be is address!
 263             }),
 264     "multicast": dict({
 265                 "name": "multicast",
 266                 "help": "Multicast enabled",
 267                 "type": Attribute.BOOL,
 268                 "value": False,
 269                 "validation_function": validation.is_bool
 270             }),
 271     "arp": dict({
 272                 "name": "arp",
 273                 "help": "ARP enabled",
 274                 "type": Attribute.BOOL,
 275                 "value": False,
 276                 "validation_function": validation.is_bool
 277             }),
 278     "command": dict({
 279                 "name": "command",
 280                 "help": "Command line string",
 281                 "type": Attribute.STRING,
 282                 "flags": Attribute.DesignOnly,
 283                 "validation_function": validation.is_string
 284             }),
 285     "user": dict({
 286                 "name": "user",
 287                 "help": "System user",
 288                 "type": Attribute.STRING,
 289                 "flags": Attribute.DesignOnly,
 290                 "validation_function": validation.is_string
 291             }),
 292     "stdin": dict({
 293                 "name": "stdin",
 294                 "help": "Standard input",
 295                 "type": Attribute.STRING,
 296                 "flags": Attribute.DesignOnly,
 297                 "validation_function": validation.is_string
 298             }),
 299     })
 300
 301 traces = dict({
 302     "stdout": dict({
 303                 "name": "stdout",
 304                 "help": "Standard output stream"
 305               }),
 306     "stderr": dict({
 307                 "name": "stderr",
 308                 "help": "Application standard error",
 309         })
 310     })
 311
 312 factories_order = [ NODE, P2PIFACE, NODEIFACE, TAPIFACE, SWITCH,
 313         APPLICATION ]
 314
 315 factories_info = dict({
 316     NODE: dict({
 317             "allow_routes": True,
 318             "help": "Emulated Node with virtualized network stack",
 319             "category": "topology",
 320             "create_function": create_node,
 321             "box_attributes": ["forward_X11"],
 322             "connector_types": ["devs", "apps"]
 323        }),
 324     P2PIFACE: dict({
 325             "allow_addresses": True,
 326             "help": "Point to point network interface",
 327             "category": "devices",
 328             "create_function": create_p2piface,
 329             "box_attributes": ["lladdr", "up", "device_name", "mtu",
 330                 "multicast", "broadcast", "arp"],
 331             "connector_types": ["node", "p2p"]
 332        }),
 333     TAPIFACE: dict({
 334             "allow_addresses": True,
 335             "help": "Tap device network interface",
 336             "category": "devices",
 337             "create_function": create_tapiface,
 338             "box_attributes": ["lladdr", "up", "device_name", "mtu",
 339                 "multicast", "broadcast", "arp"],
 340             "connector_types": ["node", "fd"]
 341         }),
 342     NODEIFACE: dict({
 343             "allow_addresses": True,
 344             "help": "Node network interface",
 345             "category": "devices",
 346             "create_function": create_nodeiface,
 347             "box_attributes": ["lladdr", "up", "device_name", "mtu",
 348                 "multicast", "broadcast", "arp"],
 349             "connector_types": ["node", "switch"]
 350         }),
 351     SWITCH: dict({
 352             "display_name": "Switch",
 353             "help": "Switch interface",
 354             "category": "devices",
 355             "create_function": create_switch,
 356             "box_attributes": ["up", "device_name", "mtu", "multicast"],
 357              #TODO: Add attribute ("Stp", help, type, value, range, allowed, readonly, validation_function),
 358              #TODO: Add attribute ("ForwarddDelay", help, type, value, range, allowed, readonly, validation_function),
 359              #TODO: Add attribute ("HelloTime", help, type, value, range, allowed, readonly, validation_function),
 360              #TODO: Add attribute ("AgeingTime", help, type, value, range, allowed, readonly, validation_function),
 361              #TODO: Add attribute ("MaxAge", help, type, value, range, allowed, readonly, validation_function)
 362            "connector_types": ["devs"]
 363         }),
 364     APPLICATION: dict({
 365             "help": "Generic executable command line application",
 366             "category": "applications",
 367             "create_function": create_application,
 368             "start_function": start_application,
 369             "status_function": status_application,
 370             "box_attributes": ["command", "user"],
 371             "connector_types": ["node"],
 372             "traces": ["stdout", "stderr"]
 373         }),
 374 })
 375
 376 testbed_attributes = dict({
 377         "enable_debug": dict({
 378                 "name": "enableDebug",
 379                 "help": "Enable netns debug output",
 380                 "type": Attribute.BOOL,
 381                 "value": False,
 382                 "validation_function": validation.is_bool
 383             }),
 384          "home_directory": dict({
 385                 "name": "homeDirectory",
 386                 "help": "Path to the directory where traces and other files \
 387                         will be stored",
 388                 "type": Attribute.STRING,
 389                 "value": False,
 390                 "flags": Attribute.DesignOnly,
 391                 "validation_function": validation.is_string
 392             })
 393     })
 394
 395 class VersionedMetadataInfo(metadata.VersionedMetadataInfo):
 396     @property
 397     def connector_types(self):
 398         return connector_types
 399
 400     @property
 401     def connections(self):
 402         return connections
 403
 404     @property
 405     def attributes(self):
 406         return attributes
 407
 408     @property
 409     def traces(self):
 410         return traces
 411
 412     @property
 413     def factories_order(self):
 414         return factories_order
 415
 416     @property
 417     def factories_info(self):
 418         return factories_info
 419
 420     @property
 421     def testbed_attributes(self):
 422         return testbed_attributes
 423