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WSDiscovery.py
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#!/usr/bin/env python2
# A cross platform Python implementation of WS-Discovery as described in the specification draft at http://schemas.xmlsoap.org/ws/2005/04/discovery/.
# WS-Discovery is used as a web services discovery protocol which is implemented using UDP multicasting and XML SOAP/UDP (http://schemas.xmlsoap.org/ws/2004/09/soap-over-udp/) specifications.
# Original version was created by L.A. Fernando lafernando@gmail.com (LGPL)
import urllib
from xml.dom import minidom
import StringIO
import random
import string
import socket
import struct
import time
import uuid
import threading
import thread
import sys
import select
import netifaces
import settings
def _getNetworkAddrs():
result = []
for if_name in netifaces.interfaces():
iface_info = netifaces.ifaddresses(if_name)
if netifaces.AF_INET in iface_info:
for addrDict in iface_info[netifaces.AF_INET]:
addr = addrDict['addr']
if addr != '127.0.0.1':
result.append(addr)
return result
def _generateInstanceId():
return str(random.randint(1, 0xFFFFFFFF))
class _StopableDaemonThread(threading.Thread):
"""Stopable daemon thread.
run() method shall exit, when self._quitEvent.wait() returned True
"""
def __init__(self):
self._quitEvent = threading.Event()
super(_StopableDaemonThread, self).__init__()
self.daemon = True
def schedule_stop(self):
"""Schedule stopping the thread.
Use join() to wait, until thread really has been stopped
"""
self._quitEvent.set()
class URI:
def __init__(self, uri):
uri = urllib.unquote(uri)
i1 = uri.find(":")
i2 = uri.find("@")
self._scheme = uri[:i1]
if i2 != -1:
self._authority = uri[i1 + 1: i2]
self._path = uri[i2 + 1:]
else:
self._authority = ""
self._path = uri[i1 + 1:]
def getScheme(self):
return self._scheme
def getAuthority(self):
return self._authority
def getPath(self):
return self._path
def getPathExQueryFragment(self):
i = self._path.find("?")
path = self.getPath()
if i != -1:
return path[:self._path.find("?")]
else:
return path
class QName:
def __init__(self, namespace, localname):
self._namespace = namespace
self._localname = localname
def getNamespace(self):
return self._namespace
def getLocalname(self):
return self._localname
def getFullname(self):
return self.getNamespace() + ":" + self.getLocalname()
def __repr__(self):
return self.getFullname()
class Scope:
def __init__(self, value, matchBy=None):
self._matchBy = matchBy
self._value = value
def getMatchBy(self):
return self._matchBy
def getValue(self):
return self._value
def getQuotedValue(self):
return self._value.replace(' ', '%20')
def __repr__(self):
if self.getMatchBy() == None or len(self.getMatchBy()) == 0:
return self.getValue()
else:
return self.getMatchBy() + ":" + self.getValue()
class ProbeResolveMatch:
def __init__(self, epr, types, scopes, xAddrs, metadataVersion):
self._epr = epr
self._types = types
self._scopes = scopes
self._xAddrs = xAddrs
self._metadataVersion = metadataVersion
def getEPR(self):
return self._epr
def getTypes(self):
return self._types
def getScopes(self):
return self._scopes
def getXAddrs(self):
return self._xAddrs
def getMetadataVersion(self):
return self._metadataVersion
def __repr__(self):
return "EPR: %s\nTypes: %s\nScopes: %s\nXAddrs: %s\nMetadata Version: %s" % \
(self.getEPR(), self.getTypes(), self.getScopes(),
self.getXAddrs(), self.getMetadataVersion())
class SoapEnvelope:
def __init__(self):
self._action = ""
self._messageId = ""
self._relatesTo = ""
self._relationshipType = None
self._to = ""
self._replyTo = ""
self._instanceId = ""
self._sequenceId = ""
self._messageNumber = ""
self._epr = ""
self._types = []
self._scopes = []
self._xAddrs = []
self._metadataVersion = "1"
self._probeResolveMatches = []
def getAction(self):
return self._action
def setAction(self, action):
self._action = action
def getMessageId(self):
return self._messageId
def setMessageId(self, messageId):
self._messageId = messageId
def getRelatesTo(self):
return self._relatesTo
def setRelatesTo(self, relatesTo):
self._relatesTo = relatesTo
def getRelationshipType(self):
return self._relationshipType
def setRelationshipType(self, relationshipType):
self._relationshipType = relationshipType
def getTo(self):
return self._to
def setTo(self, to):
self._to = to
def getReplyTo(self):
return self._replyTo
def setReplyTo(self, replyTo):
self._replyTo = replyTo
def getInstanceId(self):
return self._instanceId
def setInstanceId(self, instanceId):
self._instanceId = instanceId
def getSequenceId(self):
return self._sequenceId
def setSequenceId(self, sequenceId):
self._sequenceId = sequenceId
def getEPR(self):
return self._epr
def setEPR(self, epr):
self._epr = epr
def getMessageNumber(self):
return self._messageNumber
def setMessageNumber(self, messageNumber):
self._messageNumber = messageNumber
def getTypes(self):
return self._types
def setTypes(self, types):
self._types = types
def getScopes(self):
return self._scopes
def setScopes(self, scopes):
self._scopes = scopes
def getXAddrs(self):
return self._xAddrs
def setXAddrs(self, xAddrs):
self._xAddrs = xAddrs
def getMetadataVersion(self):
return self._metadataVersion
def setMetadataVersion(self, metadataVersion):
self._metadataVersion = metadataVersion
def getProbeResolveMatches(self):
return self._probeResolveMatches
def setProbeResolveMatches(self, probeResolveMatches):
self._probeResolveMatches = probeResolveMatches
def matchScope(src, target, matchBy):
if matchBy == "" or matchBy == None or matchBy == settings.MATCH_BY_LDAP or matchBy == settings.MATCH_BY_URI or matchBy == settings.MATCH_BY_UUID:
src = URI(src)
target = URI(target)
if src.getScheme().lower() != target.getScheme().lower():
return False
if src.getAuthority().lower() != target.getAuthority().lower():
return False
srcPath = src.getPathExQueryFragment()
targetPath = target.getPathExQueryFragment()
if srcPath == targetPath:
return True
elif targetPath.startswith(srcPath):
n = len(srcPath)
if targetPath[n - 1] == srcPath[n - 1] == '/':
return True
if targetPath[n] == '/':
return True
return False
else:
return False
elif matchBy == settings.MATCH_BY_STRCMP:
return src == target
else:
return False
def matchType(type1, type2):
return type1.getFullname() == type2.getFullname()
def getNamespaceValue(node, prefix):
while node != None:
if node.nodeType == minidom.Node.ELEMENT_NODE:
attr = node.getAttributeNode("xmlns:" + prefix)
if attr != None:
return attr.nodeValue
node = node.parentNode
return ""
def getDefaultNamespace(node):
while node != None:
if node.nodeType == minidom.Node.ELEMENT_NODE:
attr = node.getAttributeNode("xmlns")
if attr != None:
return attr.nodeValue
node = node.parentNode
return ""
def getQNameFromValue(value, node):
vals = value.split(":")
ns = ""
if len(vals) == 1:
localName = vals[0]
ns = getDefaultNamespace(node)
else:
localName = vals[1]
ns = getNamespaceValue(node, vals[0])
return QName(ns, localName)
def _parseSpaceSeparatedList(node):
if node.childNodes:
return [item.replace('%20', ' ') \
for item in node.childNodes[0].data.split()]
else:
return []
def getTypes(typeNode):
return [getQNameFromValue(item, typeNode) \
for item in _parseSpaceSeparatedList(typeNode)]
def getScopes(scopeNode):
matchBy = scopeNode.getAttribute("MatchBy")
return [Scope(item, matchBy) \
for item in _parseSpaceSeparatedList(scopeNode)]
def getXAddrs(xAddrsNode):
return _parseSpaceSeparatedList(xAddrsNode)
def createSkelSoapMessage(soapAction):
doc = minidom.Document()
envEl = doc.createElementNS(settings.NS_S, "s:Envelope")
envEl.setAttribute("xmlns:a", settings.NS_A) # minidom does not insert this automatically
envEl.setAttribute("xmlns:d", settings.NS_D)
envEl.setAttribute("xmlns:s", settings.NS_S)
doc.appendChild(envEl)
headerEl = doc.createElementNS(settings.NS_S, "s:Header")
envEl.appendChild(headerEl)
addElementWithText(doc, headerEl, "a:Action", settings.NS_A, soapAction)
bodyEl = doc.createElementNS(settings.NS_S, "s:Body")
envEl.appendChild(bodyEl)
return doc
def addElementWithText(doc, parent, name, ns, value):
el = doc.createElementNS(ns, name)
text = doc.createTextNode(value)
el.appendChild(text)
parent.appendChild(el)
def getDocAsString(doc):
outStr = ""
stream = StringIO.StringIO(outStr)
stream.write(doc.toprettyxml())
return stream.getvalue()
def getBodyEl(doc):
return doc.getElementsByTagNameNS(settings.NS_S, "Body")[0]
def getHeaderEl(doc):
return doc.getElementsByTagNameNS(settings.NS_S, "Header")[0]
def getEnvEl(doc):
return doc.getElementsByTagNameNS(settings.NS_S, "Envelope")[0]
def getRandomStr():
return "".join([random.choice(string.letters) for x in xrange(10)])
def addNSAttrToEl(el, ns, prefix):
el.setAttribute("xmlns:" + prefix, ns)
def addTypes(doc, node, types):
if types is not None and len(types) > 0:
envEl = getEnvEl(doc)
typeList = []
prefixMap = {}
for type in types:
ns = type.getNamespace()
localname = type.getLocalname()
if prefixMap.get(ns) == None:
prefix = getRandomStr()
prefixMap[ns] = prefix
else:
prefix = prefixMap.get(ns)
addNSAttrToEl(envEl, ns, prefix)
typeList.append(prefix + ":" + localname)
addElementWithText(doc, node, "d:Types", settings.NS_D, " ".join(typeList))
def addScopes(doc, node, scopes):
if scopes is not None and len(scopes) > 0:
addElementWithText(doc, node, "d:Scopes", settings.NS_D, " ".join([x.getQuotedValue() for x in scopes]))
if scopes[0].getMatchBy() is not None and len(scopes[0].getMatchBy()) > 0:
node.getElementsByTagNameNS(settings.NS_D, "Scopes")[0].setAttribute("MatchBy", scopes[0].getMatchBy())
def addXAddrs(doc, node, xAddrs):
if xAddrs is not len(xAddrs) > 0:
addElementWithText(doc, node, "d:XAddrs", settings.NS_D, " ".join([x for x in xAddrs]))
def addEPR(doc, node, epr):
eprEl = doc.createElementNS(settings.NS_A, "a:EndpointReference")
addElementWithText(doc, eprEl, "a:Address", settings.NS_A, epr)
node.appendChild(eprEl)
def parseProbeMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_PROBE)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
replyToNodes = dom.getElementsByTagNameNS(settings.NS_A, "ReplyTo")
if len(replyToNodes) > 0 and \
isinstance(replyToNodes[0].firstChild, minidom.Text):
env.setReplyTo(replyToNodes[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
typeNodes = dom.getElementsByTagNameNS(settings.NS_D, "Types")
if len(typeNodes) > 0:
env.getTypes().extend(getTypes(typeNodes[0]))
scopeNodes = dom.getElementsByTagNameNS(settings.NS_D, "Scopes")
if len(scopeNodes) > 0:
env.getScopes().extend(getScopes(scopeNodes[0]))
return env
def _parseAppSequence(dom, env):
nodes = dom.getElementsByTagNameNS(settings.NS_D, "AppSequence")
if nodes:
appSeqNode = nodes[0]
env.setInstanceId(appSeqNode.getAttribute("InstanceId"))
env.setSequenceId(appSeqNode.getAttribute("SequenceId"))
env.setMessageNumber(appSeqNode.getAttribute("MessageNumber"))
def parseProbeMatchMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_PROBE_MATCH)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
env.setRelatesTo(dom.getElementsByTagNameNS(settings.NS_A, "RelatesTo")[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
_parseAppSequence(dom, env)
pmNodes = dom.getElementsByTagNameNS(settings.NS_D, "ProbeMatch")
for node in pmNodes:
epr = node.getElementsByTagNameNS(settings.NS_A, "Address")[0].firstChild.data.strip()
types = []
typeNodes = node.getElementsByTagNameNS(settings.NS_D, "Types")
if len(typeNodes) > 0:
types = getTypes(typeNodes[0])
scopes = []
scopeNodes = node.getElementsByTagNameNS(settings.NS_D, "Scopes")
if len(scopeNodes) > 0:
scopes = getScopes(scopeNodes[0])
xAddrs = []
xAddrNodes = node.getElementsByTagNameNS(settings.NS_D, "XAddrs")
if len(xAddrNodes) > 0:
xAddrs = getXAddrs(xAddrNodes[0])
mdv = node.getElementsByTagNameNS(settings.NS_D, "MetadataVersion")[0].firstChild.data.strip()
env.getProbeResolveMatches().append(ProbeResolveMatch(epr, types, scopes, xAddrs, mdv))
return env
def parseResolveMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_RESOLVE)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
replyToNodes = dom.getElementsByTagNameNS(settings.NS_A, "ReplyTo")
if len(replyToNodes) > 0:
env.setReplyTo(replyToNodes[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
env.setEPR(dom.getElementsByTagNameNS(settings.NS_A, "Address")[0].firstChild.data.strip())
return env
def parseResolveMatchMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_RESOLVE_MATCH)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
env.setRelatesTo(dom.getElementsByTagNameNS(settings.NS_A, "RelatesTo")[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
_parseAppSequence(dom, env)
nodes = dom.getElementsByTagNameNS(settings.NS_D, "ResolveMatch")
if len(nodes) > 0:
node = nodes[0]
epr = node.getElementsByTagNameNS(settings.NS_A, "Address")[0].firstChild.data.strip()
typeNodes = node.getElementsByTagNameNS(settings.NS_D, "Types")
types = []
if len(typeNodes) > 0:
types = getTypes(typeNodes[0])
scopeNodes = node.getElementsByTagNameNS(settings.NS_D, "Scopes")
scopes = []
if len(scopeNodes) > 0:
scopes = getScopes(scopeNodes[0])
xAddrs = getXAddrs(node.getElementsByTagNameNS(settings.NS_D, "XAddrs")[0])
mdv = node.getElementsByTagNameNS(settings.NS_D, "MetadataVersion")[0].firstChild.data.strip()
env.getProbeResolveMatches().append(ProbeResolveMatch(epr, types, scopes, xAddrs, mdv))
return env
def parseHelloMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_HELLO)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
_parseAppSequence(dom, env)
relatesToNodes = dom.getElementsByTagNameNS(settings.NS_A, "RelatesTo")
if len(relatesToNodes) > 0:
env.setRelatesTo(relatesToNodes[0].firstChild.data.strip())
env.setRelationshipType(getQNameFromValue( \
relatesToNodes[0].getAttribute("RelationshipType"), relatesToNodes[0]))
env.setEPR(dom.getElementsByTagNameNS(settings.NS_A, "Address")[0].firstChild.data.strip())
typeNodes = dom.getElementsByTagNameNS(settings.NS_D, "Types")
if len(typeNodes) > 0:
env.setTypes(getTypes(typeNodes[0]))
scopeNodes = dom.getElementsByTagNameNS(settings.NS_D, "Scopes")
if len(scopeNodes) > 0:
env.setScopes(getScopes(scopeNodes[0]))
xNodes = dom.getElementsByTagNameNS(settings.NS_D, "XAddrs")
if len(xNodes) > 0:
env.setXAddrs(getXAddrs(xNodes[0]))
env.setMetadataVersion(dom.getElementsByTagNameNS(settings.NS_D, "MetadataVersion")[0].firstChild.data.strip())
return env
def parseByeMessage(dom):
env = SoapEnvelope()
env.setAction(settings.ACTION_BYE)
env.setMessageId(dom.getElementsByTagNameNS(settings.NS_A, "MessageID")[0].firstChild.data.strip())
env.setTo(dom.getElementsByTagNameNS(settings.NS_A, "To")[0].firstChild.data.strip())
_parseAppSequence(dom, env)
env.setEPR(dom.getElementsByTagNameNS(settings.NS_A, "Address")[0].firstChild.data.strip())
return env
def parseEnvelope(data, ipAddr):
try:
dom = minidom.parseString(data)
except Exception as ex:
#print >> sys.stderr, 'Failed to parse message from %s\n"%s": %s' % (ipAddr, data, ex)
return None
if dom.getElementsByTagNameNS(settings.NS_S, "Fault"):
#print >> sys.stderr, 'Fault received from %s:' % (ipAddr, data)
return None
soapAction = dom.getElementsByTagNameNS(settings.NS_A, "Action")[0].firstChild.data.strip()
if soapAction == settings.ACTION_PROBE:
return parseProbeMessage(dom)
elif soapAction == settings.ACTION_PROBE_MATCH:
return parseProbeMatchMessage(dom)
elif soapAction == settings.ACTION_RESOLVE:
return parseResolveMessage(dom)
elif soapAction == settings.ACTION_RESOLVE_MATCH:
return parseResolveMatchMessage(dom)
elif soapAction == settings.ACTION_BYE:
return parseByeMessage(dom)
elif soapAction == settings.ACTION_HELLO:
return parseHelloMessage(dom)
def createMessage(env):
if env.getAction() == settings.ACTION_PROBE:
return createProbeMessage(env)
if env.getAction() == settings.ACTION_PROBE_MATCH:
return createProbeMatchMessage(env)
if env.getAction() == settings.ACTION_RESOLVE:
return createResolveMessage(env)
if env.getAction() == settings.ACTION_RESOLVE_MATCH:
return createResolveMatchMessage(env)
if env.getAction() == settings.ACTION_HELLO:
return createHelloMessage(env)
if env.getAction() == settings.ACTION_BYE:
return createByeMessage(env)
def createProbeMessage(env):
doc = createSkelSoapMessage(settings.ACTION_PROBE)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
if len(env.getReplyTo()) > 0:
addElementWithText(doc, headerEl, "a:ReplyTo", settings.NS_A, env.getReplyTo())
probeEl = doc.createElementNS(settings.NS_D, "d:Probe")
bodyEl.appendChild(probeEl)
addTypes(doc, probeEl, env.getTypes())
addScopes(doc, probeEl, env.getScopes())
return getDocAsString(doc)
def createProbeMatchMessage(env):
doc = createSkelSoapMessage(settings.ACTION_PROBE_MATCH)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
addElementWithText(doc, headerEl, "a:RelatesTo", settings.NS_A, env.getRelatesTo())
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
appSeqEl = doc.createElementNS(settings.NS_D, "d:AppSequence")
appSeqEl.setAttribute("InstanceId", env.getInstanceId())
appSeqEl.setAttribute("MessageNumber", env.getMessageNumber())
headerEl.appendChild(appSeqEl)
probeMatchesEl = doc.createElementNS(settings.NS_D, "d:ProbeMatches")
probeMatches = env.getProbeResolveMatches()
for probeMatch in probeMatches:
probeMatchEl = doc.createElementNS(settings.NS_D, "d:ProbeMatch")
addEPR(doc, probeMatchEl, probeMatch.getEPR())
addTypes(doc, probeMatchEl, probeMatch.getTypes())
addScopes(doc, probeMatchEl, probeMatch.getScopes())
addXAddrs(doc, probeMatchEl, probeMatch.getXAddrs())
addElementWithText(doc, probeMatchEl, "d:MetadataVersion", settings.NS_D, probeMatch.getMetadataVersion())
probeMatchesEl.appendChild(probeMatchEl)
bodyEl.appendChild(probeMatchesEl)
return getDocAsString(doc)
def createResolveMessage(env):
doc = createSkelSoapMessage(settings.ACTION_RESOLVE)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
if len(env.getReplyTo()) > 0:
addElementWithText(doc, headerEl, "a:ReplyTo", settings.NS_A, env.getReplyTo())
resolveEl = doc.createElementNS(settings.NS_D, "d:Resolve")
addEPR(doc, resolveEl, env.getEPR())
bodyEl.appendChild(resolveEl)
return getDocAsString(doc)
def createResolveMatchMessage(env):
doc = createSkelSoapMessage(settings.ACTION_RESOLVE_MATCH)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
addElementWithText(doc, headerEl, "a:RelatesTo", settings.NS_A, env.getRelatesTo())
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
appSeqEl = doc.createElementNS(settings.NS_D, "d:AppSequence")
appSeqEl.setAttribute("InstanceId", env.getInstanceId())
appSeqEl.setAttribute("MessageNumber", env.getMessageNumber())
headerEl.appendChild(appSeqEl)
resolveMatchesEl = doc.createElementNS(settings.NS_D, "d:ResolveMatches")
if len(env.getProbeResolveMatches()) > 0:
resolveMatch = env.getProbeResolveMatches()[0]
resolveMatchEl = doc.createElementNS(settings.NS_D, "d:ResolveMatch")
addEPR(doc, resolveMatchEl, resolveMatch.getEPR())
addTypes(doc, resolveMatchEl, resolveMatch.getTypes())
addScopes(doc, resolveMatchEl, resolveMatch.getScopes())
addXAddrs(doc, resolveMatchEl, resolveMatch.getXAddrs())
addElementWithText(doc, resolveMatchEl, "d:MetadataVersion", settings.NS_D, resolveMatch.getMetadataVersion())
resolveMatchesEl.appendChild(resolveMatchEl)
bodyEl.appendChild(resolveMatchesEl)
return getDocAsString(doc)
def createHelloMessage(env):
doc = createSkelSoapMessage(settings.ACTION_HELLO)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
if len(env.getRelatesTo()) > 0:
addElementWithText(doc, headerEl, "a:RelatesTo", settings.NS_A, env.getRelatesTo())
relatesToEl = headerEl.getElementsByTagNameNS(settings.NS_A, "RelatesTo")[0]
relatesToEl.setAttribute("RelationshipType", "d:Suppression")
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
appSeqEl = doc.createElementNS(settings.NS_D, "d:AppSequence")
appSeqEl.setAttribute("InstanceId", env.getInstanceId())
appSeqEl.setAttribute("MessageNumber", env.getMessageNumber())
headerEl.appendChild(appSeqEl)
helloEl = doc.createElementNS(settings.NS_D, "d:Hello")
addEPR(doc, helloEl, env.getEPR())
addTypes(doc, helloEl, env.getTypes())
addScopes(doc, helloEl, env.getScopes())
addXAddrs(doc, helloEl, env.getXAddrs())
addElementWithText(doc, helloEl, "d:MetadataVersion", settings.NS_D, env.getMetadataVersion())
bodyEl.appendChild(helloEl)
return getDocAsString(doc)
def createByeMessage(env):
doc = createSkelSoapMessage(settings.ACTION_BYE)
bodyEl = getBodyEl(doc)
headerEl = getHeaderEl(doc)
addElementWithText(doc, headerEl, "a:MessageID", settings.NS_A, env.getMessageId())
addElementWithText(doc, headerEl, "a:To", settings.NS_A, env.getTo())
appSeqEl = doc.createElementNS(settings.NS_D, "d:AppSequence")
appSeqEl.setAttribute("InstanceId", env.getInstanceId())
appSeqEl.setAttribute("MessageNumber", env.getMessageNumber())
headerEl.appendChild(appSeqEl)
byeEl = doc.createElementNS(settings.NS_D, "d:Bye")
addEPR(doc, byeEl, env.getEPR())
bodyEl.appendChild(byeEl)
return getDocAsString(doc)
def extractSoapUdpAddressFromURI(uri):
val = uri.getPathExQueryFragment().split(":")
part1 = val[0][2:]
part2 = None
if val[1].count('/') > 0:
part2 = int(val[1][:val[1].index('/')])
else:
part2 = int(val[1])
addr = [part1, part2]
return addr
class AddressMonitorThread(_StopableDaemonThread):
def __init__(self, wsd):
self._addrs = set()
self._wsd = wsd
super(AddressMonitorThread, self).__init__()
self._updateAddrs()
def _updateAddrs(self):
addrs = set(_getNetworkAddrs())
disappeared = self._addrs.difference(addrs)
new = addrs.difference(self._addrs)
for addr in disappeared:
self._wsd._networkAddressRemoved(addr)
for addr in new:
self._wsd._networkAddressAdded(addr)
self._addrs = addrs
def run(self):
while not self._quitEvent.wait(settings._NETWORK_ADDRESSES_CHECK_TIMEOUT):
self._updateAddrs()
class NetworkingThread(_StopableDaemonThread):
def __init__(self, observer):
super(NetworkingThread, self).__init__()
self.setDaemon(True)
self._queue = [] # FIXME synchronisation
self._knownMessageIds = set()
self._iidMap = {}
self._observer = observer
self._poll = select.poll()
@staticmethod
def _makeMreq(addr):
return struct.pack("4s4s", socket.inet_aton(settings.MULTICAST_IPV4_ADDRESS), socket.inet_aton(addr))
@staticmethod
def _createMulticastOutSocket(addr):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setblocking(0)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 1)
if addr is None:
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF, socket.INADDR_ANY)
else:
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF, socket.inet_aton(addr))
return sock
@staticmethod
def _createMulticastInSocket():
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', settings.MULTICAST_PORT))
sock.setblocking(0)
return sock
def addSourceAddr(self, addr):
"""None means 'system default'"""
try:
self._multiInSocket.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, self._makeMreq(addr))
except socket.error: # if 1 interface has more than 1 address, exception is raised for the second
pass
sock = self._createMulticastOutSocket(addr)
self._multiOutUniInSockets[addr] = sock
self._poll.register(sock, select.POLLIN)
def removeSourceAddr(self, addr):
try:
self._multiInSocket.setsockopt(socket.IPPROTO_IP, socket.IP_DROP_MEMBERSHIP, self._makeMreq(addr))
except socket.error: # see comments for setsockopt(.., socket.IP_ADD_MEMBERSHIP..
pass
sock = self._multiOutUniInSockets[addr]
self._poll.unregister(sock)
sock.close()
del self._multiOutUniInSockets[addr]
def addUnicastMessage(self, env, addr, port, initialDelay=0):
msg = Message(env, addr, port, Message.UNICAST, initialDelay)
self._queue.append(msg)
self._knownMessageIds.add(env.getMessageId())
def addMulticastMessage(self, env, addr, port, initialDelay=0):
msg = Message(env, addr, port, Message.MULTICAST, initialDelay)
self._queue.append(msg)
self._knownMessageIds.add(env.getMessageId())
def run(self):
while not self._quitEvent.is_set() or self._queue:
self._sendPendingMessages()
self._recvMessages()
def _recvMessages(self):
for fd, event in self._poll.poll(0):
sock = socket.fromfd(fd, socket.AF_INET, socket.SOCK_DGRAM)
try:
data, addr = sock.recvfrom(settings.BUFFER_SIZE)
except socket.error, e:
time.sleep(0.01)
continue
env = parseEnvelope(data, addr[0])
if env is None: # fault or failed to parse
continue
mid = env.getMessageId()
if mid in self._knownMessageIds:
continue
else:
self._knownMessageIds.add(mid)
iid = env.getInstanceId()
mid = env.getMessageId()
if iid > 0:
mnum = env.getMessageNumber()
key = addr[0] + ":" + str(addr[1]) + ":" + str(iid)
if mid is not None and len(mid) > 0:
key = key + ":" + mid
if not self._iidMap.has_key(key):
self._iidMap[key] = iid
else:
tmnum = self._iidMap[key]
if mnum > tmnum:
self._iidMap[key] = mnum
else:
continue
self._observer.envReceived(env, addr)
def _sendMsg(self, msg):
data = createMessage(msg.getEnv())
if msg.msgType() == Message.UNICAST:
self._uniOutSocket.sendto(data, (msg.getAddr(), msg.getPort()))
else:
for sock in self._multiOutUniInSockets.values():
sock.sendto(data, (msg.getAddr(), msg.getPort()))
def _sendPendingMessages(self):
"""Method sleeps, if nothing to do"""
if len(self._queue) == 0:
time.sleep(0.1)
return
msg = self._queue.pop(0)
if msg.canSend():
self._sendMsg(msg)
msg.refresh()
if not (msg.isFinished()):
self._queue.append(msg)
else:
self._queue.append(msg)
time.sleep(0.01)
def start(self):
super(NetworkingThread, self).start()
self._uniOutSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self._multiInSocket = self._createMulticastInSocket()
self._poll.register(self._multiInSocket)
self._multiOutUniInSockets = {} # FIXME synchronisation
def join(self):
super(NetworkingThread, self).join()
self._uniOutSocket.close()
self._poll.unregister(self._multiInSocket)
self._multiInSocket.close()
class Message:
MULTICAST = 'multicast'
UNICAST = 'unicast'
def __init__(self, env, addr, port, msgType, initialDelay=0):
"""msgType shall be Message.MULTICAST or Message.UNICAST"""
self._env = env
self._addr = addr
self._port = port
self._msgType = msgType
if msgType == self.UNICAST:
udpRepeat, udpMinDelay, udpMaxDelay, udpUpperDelay = \
settings.UNICAST_UDP_REPEAT, \
settings.UNICAST_UDP_MIN_DELAY, \
settings.UNICAST_UDP_MAX_DELAY, \
settings.UNICAST_UDP_UPPER_DELAY
else:
udpRepeat, udpMinDelay, udpMaxDelay, udpUpperDelay = \
settings.MULTICAST_UDP_REPEAT, \
settings.MULTICAST_UDP_MIN_DELAY, \
settings.MULTICAST_UDP_MAX_DELAY, \
settings.MULTICAST_UDP_UPPER_DELAY
self._udpRepeat = udpRepeat
self._udpUpperDelay = udpUpperDelay
self._t = (udpMinDelay + ((udpMaxDelay - udpMinDelay) * random.random())) / 2
self._nextTime = int(time.time() * 1000) + initialDelay
def getEnv(self):
return self._env