377 lines
15 KiB
Python
377 lines
15 KiB
Python
#
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# CORE
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# Copyright (c)2011-2013 the Boeing Company.
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# See the LICENSE file included in this distribution.
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#
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# author: Jeff Ahrenholz <jeffrey.m.ahrenholz@boeing.com>
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#
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import os
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import pwd
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from core.netns import nodes
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from core.api import coreapi
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from xml.dom.minidom import Document
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from xmlutils import *
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class CoreDocumentWriter0(Document):
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''' Utility class for writing a CoreSession to XML. The init method builds
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an xml.dom.minidom.Document, and the writexml() method saves the XML file.
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'''
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def __init__(self, session):
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''' Create an empty Scenario XML Document, then populate it with
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objects from the given session.
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'''
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Document.__init__(self)
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self.session = session
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self.scenario = self.createElement("Scenario")
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self.np = self.createElement("NetworkPlan")
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self.mp = self.createElement("MotionPlan")
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self.sp = self.createElement("ServicePlan")
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self.meta = self.createElement("CoreMetaData")
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self.appendChild(self.scenario)
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self.scenario.appendChild(self.np)
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self.scenario.appendChild(self.mp)
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self.scenario.appendChild(self.sp)
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self.scenario.appendChild(self.meta)
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self.populatefromsession()
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def populatefromsession(self):
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self.session.emane.setup() # not during runtime?
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self.addorigin()
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self.adddefaultservices()
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self.addnets()
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self.addnodes()
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self.addmetadata()
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def writexml(self, filename):
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self.session.info("saving session XML file %s" % filename)
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f = open(filename, "w")
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Document.writexml(self, writer=f, indent="", addindent=" ", newl="\n", \
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encoding="UTF-8")
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f.close()
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if self.session.user is not None:
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uid = pwd.getpwnam(self.session.user).pw_uid
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gid = os.stat(self.session.sessiondir).st_gid
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os.chown(filename, uid, gid)
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def addnets(self):
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''' Add PyCoreNet objects as NetworkDefinition XML elements.
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'''
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with self.session._objslock:
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for net in self.session.objs():
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if not isinstance(net, nodes.PyCoreNet):
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continue
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self.addnet(net)
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def addnet(self, net):
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''' Add one PyCoreNet object as a NetworkDefinition XML element.
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'''
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n = self.createElement("NetworkDefinition")
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self.np.appendChild(n)
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n.setAttribute("name", net.name)
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# could use net.brname
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n.setAttribute("id", "%s" % net.objid)
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n.setAttribute("type", "%s" % net.__class__.__name__)
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self.addnetinterfaces(n, net)
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# key used with tunnel node
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if hasattr(net, 'grekey') and net.grekey is not None:
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n.setAttribute("key", "%s" % net.grekey)
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# link parameters
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for netif in net.netifs(sort=True):
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self.addnetem(n, netif)
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# wireless/mobility models
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modelconfigs = net.session.mobility.getmodels(net)
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modelconfigs += net.session.emane.getmodels(net)
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self.addmodels(n, modelconfigs)
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self.addposition(net)
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def addnetem(self, n, netif):
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''' Similar to addmodels(); used for writing netem link effects
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parameters. TODO: Interface parameters should be moved to the model
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construct, then this separate method shouldn't be required.
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'''
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params = netif.getparams()
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if len(params) == 0:
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return
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model = self.createElement("model")
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model.setAttribute("name", "netem")
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model.setAttribute("netif", netif.name)
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if hasattr(netif, "node") and netif.node is not None:
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model.setAttribute("peer", netif.node.name)
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# link between switches uses one veth interface
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elif hasattr(netif, "othernet") and netif.othernet is not None:
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if netif.othernet.name == n.getAttribute("name"):
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model.setAttribute("peer", netif.net.name)
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else:
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model.setAttribute("peer", netif.othernet.name)
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model.setAttribute("netif", netif.localname)
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# hack used for upstream parameters for link between switches
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# (see LxBrNet.linknet())
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if netif.othernet.objid == int(n.getAttribute("id")):
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netif.swapparams('_params_up')
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params = netif.getparams()
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netif.swapparams('_params_up')
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has_params = False
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for k, v in params:
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# default netem parameters are 0 or None
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if v is None or v == 0:
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continue
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if k == "has_netem" or k == "has_tbf":
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continue
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key = self.createElement(k)
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key.appendChild(self.createTextNode("%s" % v))
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model.appendChild(key)
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has_params = True
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if has_params:
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n.appendChild(model)
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def addmodels(self, n, configs):
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''' Add models from a list of model-class, config values tuples.
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'''
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for (m, conf) in configs:
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model = self.createElement("model")
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n.appendChild(model)
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model.setAttribute("name", m._name)
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type = "wireless"
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if m._type == coreapi.CORE_TLV_REG_MOBILITY:
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type = "mobility"
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model.setAttribute("type", type)
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for i, k in enumerate(m.getnames()):
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key = self.createElement(k)
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value = conf[i]
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if value is None:
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value = ""
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key.appendChild(self.createTextNode("%s" % value))
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model.appendChild(key)
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def addnodes(self):
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''' Add PyCoreNode objects as node XML elements.
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'''
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with self.session._objslock:
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for node in self.session.objs():
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if not isinstance(node, nodes.PyCoreNode):
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continue
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self.addnode(node)
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def addnode(self, node):
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''' Add a PyCoreNode object as node XML elements.
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'''
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n = self.createElement("Node")
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self.np.appendChild(n)
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n.setAttribute("name", node.name)
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n.setAttribute("id", "%s" % node.nodeid())
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if node.type:
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n.setAttribute("type", node.type)
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self.addinterfaces(n, node)
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self.addposition(node)
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addparamtoparent(self, n, "icon", node.icon)
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addparamtoparent(self, n, "canvas", node.canvas)
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self.addservices(node)
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def addinterfaces(self, n, node):
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''' Add PyCoreNetIfs to node XML elements.
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'''
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for ifc in node.netifs(sort=True):
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i = self.createElement("interface")
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n.appendChild(i)
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i.setAttribute("name", ifc.name)
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netmodel = None
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if ifc.net:
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i.setAttribute("net", ifc.net.name)
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if hasattr(ifc.net, "model"):
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netmodel = ifc.net.model
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if ifc.mtu and ifc.mtu != 1500:
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i.setAttribute("mtu", "%s" % ifc.mtu)
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# could use ifc.params, transport_type
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self.addaddresses(i, ifc)
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# per-interface models
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if netmodel and netmodel._name[:6] == "emane_":
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cfg = self.session.emane.getifcconfig(node.objid, netmodel._name,
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None, ifc)
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if cfg:
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self.addmodels(i, ((netmodel, cfg),) )
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def addnetinterfaces(self, n, net):
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''' Similar to addinterfaces(), but only adds interface elements to the
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supplied XML node that would not otherwise appear in the Node elements.
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These are any interfaces that link two switches/hubs together.
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'''
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for ifc in net.netifs(sort=True):
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if not hasattr(ifc, "othernet") or not ifc.othernet:
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continue
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i = self.createElement("interface")
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n.appendChild(i)
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if net.objid == ifc.net.objid:
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i.setAttribute("name", ifc.localname)
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i.setAttribute("net", ifc.othernet.name)
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else:
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i.setAttribute("name", ifc.name)
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i.setAttribute("net", ifc.net.name)
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def addposition(self, node):
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''' Add object coordinates as location XML element.
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'''
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(x,y,z) = node.position.get()
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if x is None or y is None:
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return
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# <Node name="n1">
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mpn = self.createElement("Node")
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mpn.setAttribute("name", node.name)
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self.mp.appendChild(mpn)
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# <motion type="stationary">
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motion = self.createElement("motion")
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motion.setAttribute("type", "stationary")
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mpn.appendChild(motion)
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# <point>$X$,$Y$,$Z$</point>
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pt = self.createElement("point")
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motion.appendChild(pt)
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coordstxt = "%s,%s" % (x,y)
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if z:
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coordstxt += ",%s" % z
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coords = self.createTextNode(coordstxt)
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pt.appendChild(coords)
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def addorigin(self):
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''' Add origin to Motion Plan using canvas reference point.
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The CoreLocation class maintains this reference point.
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'''
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refgeo = self.session.location.refgeo
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origin = self.createElement("origin")
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attrs = ("lat","lon","alt")
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have_origin = False
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for i in xrange(3):
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if refgeo[i] is not None:
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origin.setAttribute(attrs[i], str(refgeo[i]))
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have_origin = True
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if not have_origin:
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return
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if self.session.location.refscale != 1.0: # 100 pixels = refscale m
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origin.setAttribute("scale100", str(self.session.location.refscale))
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if self.session.location.refxyz != (0.0, 0.0, 0.0):
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pt = self.createElement("point")
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origin.appendChild(pt)
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x,y,z = self.session.location.refxyz
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coordstxt = "%s,%s" % (x,y)
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if z:
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coordstxt += ",%s" % z
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coords = self.createTextNode(coordstxt)
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pt.appendChild(coords)
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self.mp.appendChild(origin)
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def adddefaultservices(self):
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''' Add default services and node types to the ServicePlan.
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'''
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for type in self.session.services.defaultservices:
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defaults = self.session.services.getdefaultservices(type)
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spn = self.createElement("Node")
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spn.setAttribute("type", type)
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self.sp.appendChild(spn)
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for svc in defaults:
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s = self.createElement("Service")
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spn.appendChild(s)
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s.setAttribute("name", str(svc._name))
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def addservices(self, node):
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''' Add services and their customizations to the ServicePlan.
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'''
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if len(node.services) == 0:
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return
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defaults = self.session.services.getdefaultservices(node.type)
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if node.services == defaults:
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return
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spn = self.createElement("Node")
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spn.setAttribute("name", node.name)
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self.sp.appendChild(spn)
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for svc in node.services:
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s = self.createElement("Service")
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spn.appendChild(s)
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s.setAttribute("name", str(svc._name))
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s.setAttribute("startup_idx", str(svc._startindex))
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if svc._starttime != "":
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s.setAttribute("start_time", str(svc._starttime))
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# only record service names if not a customized service
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if not svc._custom:
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continue
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s.setAttribute("custom", str(svc._custom))
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addelementsfromlist(self, s, svc._dirs, "Directory", "name")
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for fn in svc._configs:
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if len(fn) == 0:
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continue
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f = self.createElement("File")
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f.setAttribute("name", fn)
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# all file names are added to determine when a file has been deleted
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s.appendChild(f)
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data = self.session.services.getservicefiledata(svc, fn)
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if data is None:
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# this includes only customized file contents and skips
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# the auto-generated files
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continue
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txt = self.createTextNode(data)
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f.appendChild(txt)
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addtextelementsfromlist(self, s, svc._startup, "Command",
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(("type","start"),))
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addtextelementsfromlist(self, s, svc._shutdown, "Command",
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(("type","stop"),))
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addtextelementsfromlist(self, s, svc._validate, "Command",
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(("type","validate"),))
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def addaddresses(self, i, netif):
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''' Add MAC and IP addresses to interface XML elements.
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'''
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if netif.hwaddr:
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h = self.createElement("address")
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i.appendChild(h)
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h.setAttribute("type", "mac")
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htxt = self.createTextNode("%s" % netif.hwaddr)
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h.appendChild(htxt)
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for addr in netif.addrlist:
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a = self.createElement("address")
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i.appendChild(a)
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# a.setAttribute("type", )
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atxt = self.createTextNode("%s" % addr)
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a.appendChild(atxt)
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def addhooks(self):
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''' Add hook script XML elements to the metadata tag.
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'''
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hooks = self.createElement("Hooks")
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for state in sorted(self.session._hooks.keys()):
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for (filename, data) in self.session._hooks[state]:
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hook = self.createElement("Hook")
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hook.setAttribute("name", filename)
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hook.setAttribute("state", str(state))
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txt = self.createTextNode(data)
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hook.appendChild(txt)
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hooks.appendChild(hook)
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if hooks.hasChildNodes():
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self.meta.appendChild(hooks)
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def addmetadata(self):
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''' Add CORE-specific session meta-data XML elements.
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'''
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# options
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options = self.createElement("SessionOptions")
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defaults = self.session.options.getdefaultvalues()
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for i, (k, v) in enumerate(self.session.options.getkeyvaluelist()):
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if str(v) != str(defaults[i]):
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addtextparamtoparent(self, options, k, v)
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#addparamtoparent(self, options, k, v)
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if options.hasChildNodes():
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self.meta.appendChild(options)
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# hook scripts
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self.addhooks()
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# meta
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meta = self.createElement("MetaData")
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self.meta.appendChild(meta)
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for (k, v) in self.session.metadata.items():
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addtextparamtoparent(self, meta, k, v)
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#addparamtoparent(self, meta, k, v)
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