def unpack(cls, data): rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) etag = EthernetTag.unpack(data[18:22]) label = Labels.unpack(data[22:25]) return cls(rd, esi, etag, label, data)
def unpack (cls, exdata): data = exdata # Get the data length to understand if addresses are IPv4 or IPv6 datalen = len(data) rd = RouteDistinguisher.unpack(data[:8]) data = data[8:] esi = ESI.unpack(data[:10]) data = data[10:] etag = EthernetTag.unpack(data[:4]) data = data[4:] iplen = ord(data[0]) data = data[1:] if datalen == (26 + 8): # Using IPv4 addresses ip = IP.unpack(data[:4]) data = data[4:] gwip = IP.unpack(data[:4]) data = data[4:] elif datalen == (26 + 32): # Using IPv6 addresses ip = IP.unpack(data[:16]) data = data[16:] gwip = IP.unpack(data[:16]) data = data[16:] else: raise Notify(3,5,"Data field length is given as %d, but EVPN route currently support only IPv4 or IPv6(34 or 58)" % iplen) label = Labels.unpack(data[:3]) return cls(rd,esi,etag,label,ip,iplen,gwip,exdata)
def unpack (cls, data): datalen = len(data) rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) etag = EthernetTag.unpack(data[18:22]) maclength = ord(data[22]) if (maclength > 48 or maclength < 0): raise Notify(3,5,'invalid MAC Address length in %s' % cls.NAME) end = 23 + 6 # MAC length MUST be 6 mac = MACQUAL.unpack(data[23:end]) length = ord(data[end]) iplen = length / 8 if datalen in [33,36]: # No IP information (1 or 2 labels) iplenUnpack = 0 if iplen != 0: raise Notify(3,5,"IP length is given as %d, but current MAC route has no IP information" % iplen) elif datalen in [37, 40]: # Using IPv4 addresses (1 or 2 labels) iplenUnpack = 4 if (iplen > 32 or iplen < 0): raise Notify(3,5,"IP field length is given as %d, but current MAC route is IPv4 and valus is out of range" % iplen) elif datalen in [49, 52]: # Using IPv6 addresses (1 or 2 labels) iplenUnpack = 16 if (iplen > 128 or iplen < 0): raise Notify(3,5,"IP field length is given as %d, but current MAC route is IPv6 and valus is out of range" % iplen) else: raise Notify(3,5,"Data field length is given as %d, but does not match one of the expected lengths" % datalen) ip = IP.unpack(data[end+1:end+1+iplenUnpack]) label = Labels.unpack(data[end+1+iplenUnpack:end+1+iplenUnpack+3]) return cls(rd,esi,etag,mac,maclength,label,ip,data)
def unpack (cls, data): rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) etag = EthernetTag.unpack(data[18:22]) label = Labels.unpack(data[22:25]) return cls(rd,esi,etag,label,data)
def unpack(cls, data): datalen = len(data) rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) etag = EthernetTag.unpack(data[18:22]) maclength = data[22] if maclength > 48 or maclength < 0: raise Notify(3, 5, 'invalid MAC Address length in %s' % cls.NAME) end = 23 + 6 # MAC length MUST be 6 mac = MACQUAL.unpack(data[23:end]) length = data[end] iplen = length / 8 if datalen in [33, 36]: # No IP information (1 or 2 labels) iplenUnpack = 0 if iplen != 0: raise Notify( 3, 5, "IP length is given as %d, but current MAC route has no IP information" % iplen) elif datalen in [37, 40]: # Using IPv4 addresses (1 or 2 labels) iplenUnpack = 4 if iplen > 32 or iplen < 0: raise Notify( 3, 5, "IP field length is given as %d, but current MAC route is IPv4 and valus is out of range" % iplen, ) elif datalen in [49, 52]: # Using IPv6 addresses (1 or 2 labels) iplenUnpack = 16 if iplen > 128 or iplen < 0: raise Notify( 3, 5, "IP field length is given as %d, but current MAC route is IPv6 and valus is out of range" % iplen, ) else: raise Notify( 3, 5, "Data field length is given as %d, but does not match one of the expected lengths" % datalen) payload = data[end + 1:end + 1 + iplenUnpack] if payload: ip = IP.unpack(data[end + 1:end + 1 + iplenUnpack]) else: ip = None label = Labels.unpack(data[end + 1 + iplenUnpack:end + 1 + iplenUnpack + 3]) return cls(rd, esi, etag, mac, maclength, label, ip, data)
def unpack (cls, data): rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) iplen = ordinal(data[18]) if iplen not in (32,128): raise Notify(3,5,"IP length field is given as %d in current Segment, expecting 32 (IPv4) or 128 (IPv6) bits" % iplen) ip = IP.unpack(data[19:19+(iplen//8)]) return cls(rd,esi,ip,data)
def unpack(cls, data): rd = RouteDistinguisher.unpack(data[:8]) esi = ESI.unpack(data[8:18]) iplen = ord_(data[18]) if iplen not in (32, 128): raise Notify( 3, 5, "IP field length is given as %d in current Segment, expecting 32 (IPv4) or 128 (IPv6) bits" % iplen) ip = IP.unpack(data[19:19 + (iplen / 8)]) return cls(rd, esi, ip, data)