Python AFI.create方法代码示例

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
	def unpack_nlri (cls, afi, safi, data, action, addpath):
		if not cls.logger:
			cls.logger = Logger()

		a,s = AFI.create(afi),SAFI.create(safi)
		cls.logger.debug(LazyNLRI(a,s,addpath,data),'parser')

		key = '%s/%s' % (a, s)
		if key in cls.registered_nlri:
			return cls.registered_nlri[key].unpack_nlri(a,s,data,action,addpath)
		raise Notify(3,0,'trying to decode unknown family %s/%s' % (a,s))

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
		def register_nlri (klass):
			new = (AFI.create(afi),SAFI.create(safi))
			if new in cls.registered_nlri:
				if force:
					# python has a bug and does not allow %ld/%ld (pypy does)
					cls.registered_nlri['%s/%s' % new] = klass
				else:
					raise RuntimeError('Tried to register %s/%s twice' % new)
			else:
				# python has a bug and does not allow %ld/%ld (pypy does)
				cls.registered_nlri['%s/%s' % new] = klass
				cls.registered_families.append(new)
			return klass

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
	def unpack (cls, data, negotiated):
		nlris = []

		# -- Reading AFI/SAFI
		afi,safi = unpack('!HB',data[:3])
		offset = 3
		data = data[offset:]

		if negotiated and (afi,safi) not in negotiated.families:
			raise Notify(3,0,'presented a non-negotiated family %s %s' % (AFI.create(afi),SAFI.create(safi)))

		# Is the peer going to send us some Path Information with the route (AddPath)
		addpath = negotiated.addpath.receive(afi,safi)

		while data:
			nlri,data = NLRI.unpack_nlri(afi,safi,data,IN.WITHDRAWN,addpath)
			nlris.append(nlri)

		return cls(afi,safi,nlris)

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
	def __init__ (self, what, afi, safi, data=b''):
		Operational.__init__(self,what)
		self.afi = AFI.create(afi)
		self.safi = SAFI.create(safi)
		self.data = data

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
	def unpack (cls, data, negotiated):
		nlris = []

		# -- Reading AFI/SAFI
		_afi,_safi = unpack('!HB',data[:3])
		afi,safi = AFI.create(_afi),SAFI.create(_safi)
		offset = 3

		# we do not want to accept unknown families
		if negotiated and (afi,safi) not in negotiated.families:
			raise Notify(3,0,'presented a non-negotiated family %s/%s' % (afi,safi))

		# -- Reading length of next-hop
		len_nh = ordinal(data[offset])
		offset += 1

		if (afi,safi) not in Family.size:
			raise Notify(3,0,'unsupported %s %s' % (afi,safi))

		length,rd = Family.size[(afi,safi)]

		if len_nh not in length:
			raise Notify(3,0,'invalid %s %s next-hop length %d expected %s' % (afi,safi,len_nh,' or '.join(str(_) for _ in length)))

		size = len_nh - rd

		# XXX: FIXME: GET IT FROM CACHE HERE ?
		nhs = data[offset+rd:offset+rd+size]
		nexthops = [nhs[pos:pos+16] for pos in range(0,len(nhs),16)]

		# chech the RD is well zero
		if rd and sum([int(ordinal(_)) for _ in data[offset:8]]) != 0:
			raise Notify(3,0,"MP_REACH_NLRI next-hop's route-distinguisher must be zero")

		offset += len_nh

		# Skip a reserved bit as somone had to bug us !
		reserved = ordinal(data[offset])
		offset += 1

		if reserved != 0:
			raise Notify(3,0,'the reserved bit of MP_REACH_NLRI is not zero')

		# Is the peer going to send us some Path Information with the route (AddPath)
		addpath = negotiated.addpath.receive(afi,safi)

		# Reading the NLRIs
		data = data[offset:]

		if not data:
			raise Notify(3,0,'No data to decode in an MPREACHNLRI but it is not an EOR %d/%d' % (afi,safi))

		while data:
			if nexthops:
				for nexthop in nexthops:
					nlri,left = NLRI.unpack_nlri(afi,safi,data,IN.ANNOUNCED,addpath)
					nlri.nexthop = NextHop.unpack(nexthop)
					nlris.append(nlri)
			else:
				nlri,left = NLRI.unpack_nlri(afi,safi,data,IN.ANNOUNCED,addpath)
				nlris.append(nlri)

			if left == data:
				raise RuntimeError("sub-calls should consume data")

			data = left
		return cls(afi,safi,nlris)

# 需要导入模块: from exabgp.protocol.family import AFI [as 别名]
# 或者: from exabgp.protocol.family.AFI import create [as 别名]
	def __init__ (self, afi, safi, reserved=0):
		self.afi = AFI.create(afi)
		self.safi = SAFI.create(safi)
		self.reserved = Reserved(reserved)