def build_request(self,
authtoken=None,
contcred=None,
streamid=None,
requestid=None,
reserved=None,
credtype=None,
dlen=None,
cred=None):
"""Return a packed kXR_auth request."""
if not authtoken and not contcred:
print "[!] Can't build kXR_auth request: no auth token or continuation \
credentials supplied"
sys.exit(1)
credname, credentials, credlen = \
self.getcredentials(authtoken, contcred, self.context['socket'].fileno())
request_struct = getMessageStruct(
'ClientRequestHdr') + getMessageStruct('ClientAuthRequest')
params = \
{'streamid' : streamid if streamid else self.context['streamid'],
'requestid' : requestid if requestid else XProtocol.XRequestTypes.kXR_auth,
'reserved' : reserved if reserved else 12 * '\0',
'credtype' : credtype if credtype else credname.ljust(4, '\0'),
'dlen' : dlen if dlen else credlen,
'cred' : cred if cred else credentials}
return self.mh.build_message(request_struct, params)
def kXR_open(self, streamid=None, status=None, dlen=None, fhandle=None,
cpsize=None , cptype=None, data=None):
"""Return a packed representation of a kXR_open response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Open')
params = {
'streamid': streamid if streamid else 0,
'status': status if status else getResponseId('kXR_ok'),
'dlen': 0,
'fhandle': fhandle if fhandle else (4 * '\0') }
toBeRemoved = []
if cpsize != None: params['cpsize'] = cpsize
else: toBeRemoved.append('cpsize')
if cptype != None: params['cptype'] = cptype
else: toBeRemoved.append('cptype')
if data != None:
params['data'] = data
self.mh.setFieldAttribute( responseStruct, 'data', 'size', len( data ) )
else: toBeRemoved.append('data')
responseStruct = self.mh.removeFields( responseStruct, toBeRemoved )
msg = self.mh.buildMessageFormat( responseStruct, params )
msg[1][2] = msg[2] - 8
return self.mh.pack( msg[0], msg[1] )
def kXR_login(self, streamid=None, status=None, dlen=None, sessid=None,
sec=None, verifyAuth=False):
"""Return a packed representation of a kXR_login response.
Pass verify_auth=True to enable authentication."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Login')
# Check if client needs to authenticate
if verifyAuth and not sec:
auth = AuthHelper.AuthHelper(self.context)
sec = auth.getsectoken()
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_ok'),
'dlen' : dlen if dlen else 0,
'sessid' : sessid if sessid else genSessId() }
toBeRemoved = []
if sec != None:
params['sec'] = sec
self.mh.setFieldAttribute( responseStruct, 'sec', 'size', len( sec ) )
else:
responseStruct = self.mh.removeFields( responseStruct, ['sec'] )
msg = self.mh.buildMessageFormat( responseStruct, params )
msg[1][2] = msg[2] - 8
return self.mh.pack( msg[0], msg[1] )
def kXR_waitresp(self, streamid=None, status=None, dlen=None, seconds=None):
"""Return a packed representation of a kXR_waitresp response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Waitresp')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_waitresp'),
'dlen' : dlen if dlen else 4,
'seconds' : seconds if seconds else 0}
return self.mh.buildMessage(responseStruct, params)
def kXR_bind( self, streamid=None, status=None, dlen=None, pathid=None ):
"""Return a packed representation of a kXR_bind response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Bind')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_ok'),
'dlen' : dlen if dlen else 1,
'pathid' : pathid if pathid else '\0'}
return self.mh.buildMessage(responseStruct, params)
def kXR_attn_asyncwt(self, streamid=None, status=None, dlen=None, actnum=None,
wsec=None):
"""Return a packed representation of a kXR_attn_asyncwt response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Attn_asyncwt')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_attn'),
'dlen' : dlen if dlen else 8,
'actnum' : actnum if actnum else get_attncode('kXR_asyncwt'),
'wsec' : wsec if wsec else 0}
return self.mh.buildMessage(responseStruct, params)
def handshake( self, streamid=None, status=None, dlen=None, pval=None,
flag=None ):
"""Return a packed representation of a server handshake response."""
responseStruct = getMessageStruct('ServerResponseHeader') \
+ getMessageStruct('ServerInitHandShake')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else 0,
'dlen' : dlen if dlen else 8,
'pval' : pval if pval is not None else XProtocol.kXR_PROTOCOLVERSION,
'flag' : flag if flag is not None else XProtocol.kXR_DataServer }
return self.mh.buildMessage(responseStruct, params)
def kXR_attn_asynresp(self, payloadLength):
"""Return a packed representation of a kXR_attn_asynresp response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Attn') + \
getMessageStruct('ServerResponseBody_Attn_asynresp')
params = {
'streamid': 0,
'status' : getResponseId('kXR_attn'),
'dlen' : payloadLength + 8,
'actnum' : getAttnCode('kXR_asynresp'),
'reserved': 4 * '\0' }
return self.mh.buildMessage(responseStruct, params)
def kXR_attn_asyncab(self, streamid=None, status=None, dlen=None, actnum=None,
msg=None):
"""Return a packed representation of a kXR_attn_asyncab response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Attn')
if not msg: msg = ''
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_attn'),
'dlen' : dlen if dlen else len(msg) + 4,
'actnum' : actnum if actnum else get_attncode('kXR_asyncab'),
'parms' : msg}
return self.mh.buildMessage(responseStruct, params)
def kXR_protocol(self, streamid=None, status=None, dlen=None, pval=None,
flags=None):
"""Return a packed representation of a kXR_protocol response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Protocol')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_ok'),
'dlen' : dlen if dlen else 8,
'pval' : pval if pval else XProtocol.kXR_PROTOCOLVERSION,
'flags' : flags if flags else XProtocol.kXR_isServer}
return self.mh.buildMessage(responseStruct, params)
def kXR_attn_asyncrd(self, streamid=None, status=None, dlen=None, actnum=None,
port=None, host=None, token=None):
"""Return a packed representation of a kXR_attn_asyncrd response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Attn_asyncrd')
if not host: host = ''
else: host += (token if token else '')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_attn'),
'dlen' : dlen if dlen else len(host),
'actnum' : actnum if actnum else get_attncode('kXR_asyncrd'),
'port' : port if port else 0,
'host' : host}
return self.mh.buildMessage(responseStruct, params)
def kXR_error(self, streamid=None, status=None, dlen=None, errnum=None,
errmsg=None):
"""Return a packed representation of a kXR_error response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Error')
if not errmsg: errmsg = ''
if not errnum: errnum = XProtocol.XErrorCode.kXR_ArgInvalid
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_error'),
'dlen' : dlen if dlen else len(errmsg + str(errnum)),
'errnum' : errnum,
'errmsg' : errmsg}
self.mh.setFieldAttribute( responseStruct, 'errmsg', 'size', len(errmsg) )
return self.mh.buildMessage(responseStruct, params)
def kXR_wait(self, streamid=None, status=None, dlen=None, seconds=None,
infomsg=None):
"""Return a packed representation of a kXR_wait response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Wait')
if not infomsg: infomsg = ''
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_wait'),
'dlen' : dlen if dlen else len(infomsg) + 4,
'seconds' : seconds if seconds else 0,
'infomsg' : infomsg}
self.mh.setFieldAttribute( responseStruct, 'infomsg', 'size', len( infomsg ) )
return self.mh.buildMessage(responseStruct, params)
def kXR_ok(self, streamid=None, status=None, dlen=None, data=None):
"""Return a packed representation of a kXR_ok response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Buffer')
if not data: data = ''
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_ok'),
'dlen' : dlen if dlen else len(data),
'data' : data }
self.mh.setFieldAttribute( responseStruct, 'data', 'size', len( data ) )
return self.mh.buildMessage(responseStruct, params)
def kXR_redirect(self, streamid=None, status=None, dlen=None, port=None,
host=None, opaque=None, token=None):
"""Return a packed representation of a kXR_redirect response."""
responseStruct = getMessageStruct('ServerResponseHeader') + \
getMessageStruct('ServerResponseBody_Redirect')
if not host: host = ''
else: host += (opaque if opaque else '') + (token if token else '')
params = {
'streamid': streamid if streamid else 0,
'status' : status if status else getResponseId('kXR_redirect'),
'dlen' : dlen if dlen else len(host) + 4,
'port' : port if port else 0,
'host' : host if host else r''}
self.mh.setFieldAttribute( responseStruct, 'host', 'size', len(host) )
return self.mh.buildMessage(responseStruct, params)
def build_response(self, cred=None, streamid=None, status=None, dlen=None):
"""Return a packed kXR_auth response."""
if cred:
self.auth(cred)
response_struct = getMessageStruct('ServerResponseHeader')
params = \
{'streamid' : streamid if streamid else 0,
'status' : status if status else XProtocol.XResponseType.kXR_ok,
'dlen' : dlen if dlen else 0}
return self.mh.build_message(response_struct, params)
def build_response(self, cred=None, streamid=None, status=None, dlen=None):
"""Return a packed kXR_auth response."""
if cred:
self.auth(cred)
response_struct = getMessageStruct('ServerResponseHeader')
params = \
{'streamid' : streamid if streamid else 0,
'status' : status if status else XProtocol.XResponseType.kXR_ok,
'dlen' : dlen if dlen else 0}
return self.mh.build_message(response_struct, params)
def build_request(self, authtoken=None, contcred=None, streamid=None,
requestid=None, reserved=None, credtype=None, dlen=None,
cred=None):
"""Return a packed kXR_auth request."""
if not authtoken and not contcred:
print "[!] Can't build kXR_auth request: no auth token or continuation \
credentials supplied"
sys.exit(1)
credname, credentials, credlen = \
self.getcredentials(authtoken, contcred, self.context['socket'].fileno())
request_struct = getMessageStruct('ClientRequestHdr') + getMessageStruct('ClientAuthRequest')
params = \
{'streamid' : streamid if streamid else self.context['streamid'],
'requestid' : requestid if requestid else XProtocol.XRequestTypes.kXR_auth,
'reserved' : reserved if reserved else 12 * '\0',
'credtype' : credtype if credtype else credname.ljust(4, '\0'),
'dlen' : dlen if dlen else credlen,
'cred' : cred if cred else credentials}
return self.mh.build_message(request_struct, params)
def kXR_readv( self, streamid=None, status=None, dlen=None, data=None,
chunks = None ):
"""
Return a packed representation of a kXR_readv response.
chunks is a list of 4-tuples of the following format:
(fhandle, length, offset, data)
"""
if chunks != None:
headerFormat = self.mh.getMessageFormat( getMessageStruct( 'read_list' ) )
data = ''
for chunk in chunks:
data += self.mh.pack( headerFormat, (chunk[0], chunk[1], chunk[2]) )
data += chunk[3]
return self.kXR_ok( streamid, status, dlen, data )
def unpackReadVRequest( self, request ):
"""Unpack the chunks received in the readv request"""
data = request[-1]
self.logger.debug( 'Unpacking %s worth of readv chunks' % (len(data)) )
if not len(data):
return []
readFormat = self.getMessageFormat( getMessageStruct( 'read_list' ) )
readLength = struct.calcsize( readFormat )
chunksRaw = [data[x:x+readLength] for x in range(0, len(data), readLength)]
chunkType = namedtuple( 'chunk_request', 'fhandle length offset' )
chunks = []
for chunk in chunksRaw:
c = chunkType( *self.unpack( readFormat, chunk ) )
chunks.append( c )
self.logger.debug( 'Unpacked %d chunks: %s' % (len(chunksRaw), str(chunks)) )
return [('chunks', chunks)]
def unpackRequest( self, requestRaw ):
"""Return an unpacked named tuple representation of a client request."""
if len( requestRaw ) < 20:
return None
#---------------------------------------------------------------------------
# Figure out the request type and build the map of fields
#---------------------------------------------------------------------------
requestId = self.unpack('>H', requestRaw[2:4])[0]
self.logger.debug( 'Received request with id %d' % (requestId) )
if requestId == XProtocol.XRequestTypes.handshake:
requestStruct = getMessageStruct('ClientInitHandShake')
self.logger.debug( 'Mapped request type: handshake' )
else:
requestType = XProtocol.XRequestTypes.reverseMapping[requestId]
requestTypeName = requestType[4:].title()
self.logger.debug( 'Mapped request type: %s %s' % (requestType, requestTypeName) )
requestStruct = getMessageStruct( 'ClientRequestHdr' )
requestStruct += getMessageStruct( 'Client' + requestTypeName + 'Request' )
if requestId == XProtocol.XRequestTypes.kXR_read:
requestStruct += getMessageStruct( 'read_args' )
#---------------------------------------------------------------------------
# Build unpacking format string for this message
#---------------------------------------------------------------------------
format = '>'
for member in requestStruct:
if member.has_key('size'):
if member['size'] == 'dlen':
format += str(len(requestRaw) - formatLength(format)) \
+ member['type']
else:
format += str(member['size']) + member['type']
else:
format += member['type']
self.logger.debug( 'Unpack format is: %s' % (format) )
#---------------------------------------------------------------------------
# Convert the binary message to a named tupple
#---------------------------------------------------------------------------
requestTuple = self.unpack(format, requestRaw)
# Convert to named tuple
requestStruct.insert( 0, {'name': 'type'} )
if requestId == XProtocol.XRequestTypes.handshake:
type = 'handshake'
else:
type = getRequestId( requestId )
#---------------------------------------------------------------------------
extra = []
if requestId == XProtocol.XRequestTypes.kXR_readv:
extra = self.unpackReadVRequest( requestTuple )
extraData = []
extraFields = []
for e in extra:
extraData.append( e[1] )
extraFields.append( e[0] )
requestTuple += tuple( extraData )
extraFields = ' ' + ' '.join( extraFields )
request = namedtuple('request',
' '.join([m['name'] for m in requestStruct]) +
extraFields)
return request(type, *requestTuple)
def unpack_response(self, response_raw, request_raw):
"""Return an unpacked named tuple representation of a server response."""
if not len(response_raw):
return ''
# Unpack the request that generated this response for reference
request = self.unpack_request(request_raw)[0]
requestid = get_requestid(request.type)
# Unpack the response header to find the status and data length
header_struct = getMessageStruct('ServerResponseHeader')
format = '>'
for member in header_struct:
format += member['type']
header = self.unpack(format + (str(len(response_raw) - 8) + 's'),
response_raw)
streamid = header[0]
status = header[1]
dlen = header[2]
body = header[-1]
# Check if this is a handshake response
if requestid == XProtocol.XRequestTypes.handshake:
body_struct = getMessageStruct('ServerInitHandShake')
# Check if this is an asynchronous response
elif status == XProtocol.XResponseType.kXR_attn:
# Extract the attn code
attncode = self.unpack('>H', body[:2])[0]
body_struct = getMessageStruct('ServerResponseBody_Attn_' \
+ get_attncode(attncode)[4:])
if not body_struct:
body_struct = body_struct = getMessageStruct('ServerResponseBody_Attn')
# Check if this is more than a simple kXR_ok response
elif status != XProtocol.XResponseType.kXR_ok:
body_struct = getMessageStruct('ServerResponseBody_' \
+ get_responseid(status)[4:].title())
else:
body_struct = getMessageStruct('ServerResponseBody_' \
+ request.type[4:].title())
if not body_struct: body_struct = list()
response_struct = header_struct + body_struct
# The number of params in a kXR_open response depends on the options that
# were passed in the request.
if requestid == XProtocol.XRequestTypes.kXR_open:
# Remove members from the response struct if the option was not given in
# the request.
response_struct[:] = [m for m in response_struct
if self.option_included(m, request, response_raw)]
# Build complete format string
format = '>'
for member in response_struct:
if member.has_key('size'):
if member['size'] == 'dlen':
if member.has_key('offset'):
format += str(dlen - member['offset']) + member['type']
else:
format += str(dlen) + member['type']
else:
format += str(member['size']) + member['type']
else:
format += member['type']
if len(body_struct) == 0 and dlen > 0:
format += (str(dlen) + 's')
# Unpack to regular tuple
response_tuple = self.unpack(format, response_raw)
# Convert to named tuple
response_struct.insert(0, {'name': 'type'})
type = get_responseid(status)
response = namedtuple('response',
' '.join([m['name'] for m in response_struct]))
return response(type, *response_tuple)
