def unpack(cls, afi, safi, data, addpath, nexthop, action):
labels, rd, path_identifier, mask, size, prefix, left = NLRI._nlri(
afi, safi, data, action, addpath)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if path_identifier:
nlri.path_info = PathInfo(None, None, path_identifier)
return len(data) - len(left), nlri
def unpack (cls,afi,safi,bgp,addpath,nexthop,action): labels,rd,mask,size,prefix,left = NLRI._nlri(afi,safi,bgp,action) nlri = cls(afi,safi,prefix,mask,nexthop,action) if labels: nlri.labels = Labels(labels) if rd: nlri.rd = RouteDistinguisher(rd) return len(bgp) - len(left),nlri
def unpack (cls,afi,safi,bgp,addpath,nexthop,action): labels,rd,mask,size,prefix,left = NLRI._nlri(afi,safi,bgp,action) nlri = cls(afi,safi,prefix,mask,nexthop,action) if labels: nlri.labels = Labels(labels) if rd: nlri.rd = RouteDistinguisher(rd) return len(bgp) - len(left),nlri
def unpack (cls,afi,safi,bgp,addpath,nexthop,action): labels,rd,path_identifier,mask,size,prefix,left = NLRI._nlri(afi,safi,bgp,action,addpath) nlri = cls(afi,safi,prefix,mask,nexthop,action) if labels: nlri.labels = Labels(labels) if rd: nlri.rd = RouteDistinguisher(rd) if path_identifier: nlri.path_info = PathInfo(None,None,path_identifier) return len(bgp) - len(left),nlri
def unpack(cls, afi, safi, bgp, addpath, nexthop, action):
labels, rd, path_identifier, mask, size, prefix, left = NLRI._nlri(
afi, safi, bgp, action, addpath)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if labels: nlri.labels = Labels(labels)
if rd: nlri.rd = RouteDistinguisher(rd)
if path_identifier:
nlri.path_info = PathInfo(None, None, path_identifier)
return len(bgp) - len(left), nlri
def unpack (cls,afi,safi,data,addpath,nexthop,action): if addpath: path_identifier = PathInfo(None,None,data[:4]) data = data[4:] length = 4 else: path_identifier = None length = 0 labels,rd,mask,size,prefix,left = NLRI._nlri(afi,safi,data,action) nlri = cls(afi,safi,prefix,mask,nexthop,action) if addpath: nlri.path_info = path_identifier return length + len(data) - len(left),nlri
def unpack(cls, afi, safi, data, addpath, nexthop, action):
if addpath:
path_identifier = PathInfo(None, None, data[:4])
data = data[4:]
length = 4
else:
path_identifier = None
length = 0
labels, rd, mask, size, prefix, left = NLRI._nlri(
afi, safi, data, action)
nlri = cls(afi, safi, prefix, mask, nexthop, action)
if addpath:
nlri.path_info = path_identifier
return length + len(data) - len(left), nlri
def unpack (cls,afi,safi,bgp,has_multiple_path,nexthop,action):
total = len(bgp)
length,bgp = ord(bgp[0]),bgp[1:]
if length & 0xF0 == 0xF0: # bigger than 240
extra,bgp = ord(bgp[0]),bgp[1:]
length = ((length & 0x0F) << 16) + extra
if length > len(bgp):
raise Notify(3,10,'invalid length at the start of the the flow')
bgp = bgp[:length]
nlri = Flow(afi,safi,nexthop)
nlri.action = action
if safi == SAFI.flow_vpn:
nlri.rd = RouteDistinguisher(bgp[:8])
bgp = bgp[8:]
seen = []
while bgp:
what,bgp = ord(bgp[0]),bgp[1:]
if what not in decode.get(afi,{}):
raise Notify(3,10,'unknown flowspec component received for address family %d' % what)
seen.append(what)
if sorted(seen) != seen:
raise Notify(3,10,'components are not sent in the right order %s' % seen)
decoder = decode[afi][what]
klass = factory[afi][what]
if decoder == 'prefix':
if afi == AFI.ipv4:
_,rd,mask,size,prefix,left = NLRI._nlri(afi,safi,bgp,action)
adding = klass(prefix,mask)
if not nlri.add(adding):
raise Notify(3,10,'components are incompatible (two sources, two destinations, mix ipv4/ipv6) %s' % seen)
# logger.parser(LazyFormat("added flow %s (%s) payload " % (klass.NAME,adding),od,bgp[:-len(left)]))
bgp = left
else:
byte,bgp = bgp[1],bgp[0]+bgp[2:]
offset = ord(byte)
_,rd,mask,size,prefix,left = NLRI._nlri(afi,safi,bgp,action)
adding = klass(prefix,mask,offset)
if not nlri.add(adding):
raise Notify(3,10,'components are incompatible (two sources, two destinations, mix ipv4/ipv6) %s' % seen)
# logger.parser(LazyFormat("added flow %s (%s) payload " % (klass.NAME,adding),od,bgp[:-len(left)]))
bgp = left
else:
end = False
while not end:
byte,bgp = ord(bgp[0]),bgp[1:]
end = CommonOperator.eol(byte)
operator = CommonOperator.operator(byte)
length = CommonOperator.length(byte)
value,bgp = bgp[:length],bgp[length:]
adding = klass.decoder(value)
nlri.add(klass(operator,adding))
# logger.parser(LazyFormat("added flow %s (%s) operator %d len %d payload " % (klass.NAME,adding,byte,length),od,value))
return total-len(bgp),nlri
def unpack(cls, afi, safi, bgp, has_multiple_path, nexthop, action):
total = len(bgp)
length, bgp = ord(bgp[0]), bgp[1:]
if length & 0xF0 == 0xF0: # bigger than 240
extra, bgp = ord(bgp[0]), bgp[1:]
length = ((length & 0x0F) << 16) + extra
if length > len(bgp):
raise Notify(3, 10, 'invalid length at the start of the the flow')
bgp = bgp[:length]
nlri = Flow(afi, safi, nexthop)
nlri.action = action
if safi == SAFI.flow_vpn:
nlri.rd = RouteDistinguisher(bgp[:8])
bgp = bgp[8:]
seen = []
while bgp:
what, bgp = ord(bgp[0]), bgp[1:]
if what not in decode.get(afi, {}):
raise Notify(
3, 10,
'unknown flowspec component received for address family %d'
% what)
seen.append(what)
if sorted(seen) != seen:
raise Notify(
3, 10,
'components are not sent in the right order %s' % seen)
decoded = decode[afi][what]
klass = factory[afi][what]
if decoded == 'prefix':
if afi == AFI.ipv4:
_, rd, _, mask, size, prefix, left = NLRI._nlri(
afi, safi, bgp, action, False)
adding = klass(prefix, mask)
if not nlri.add(adding):
raise Notify(
3, 10,
'components are incompatible (two sources, two destinations, mix ipv4/ipv6) %s'
% seen)
# logger.parser(LazyFormat("added flow %s (%s) payload " % (klass.NAME,adding),bgp[:-len(left)]))
bgp = left
else:
byte, bgp = bgp[1], bgp[0] + bgp[2:]
offset = ord(byte)
_, rd, _, mask, size, prefix, left = NLRI._nlri(
afi, safi, bgp, action, False)
adding = klass(prefix, mask, offset)
if not nlri.add(adding):
raise Notify(
3, 10,
'components are incompatible (two sources, two destinations, mix ipv4/ipv6) %s'
% seen)
# logger.parser(LazyFormat("added flow %s (%s) payload " % (klass.NAME,adding),bgp[:-len(left)]))
bgp = left
else:
end = False
while not end:
byte, bgp = ord(bgp[0]), bgp[1:]
end = CommonOperator.eol(byte)
operator = CommonOperator.operator(byte)
length = CommonOperator.length(byte)
value, bgp = bgp[:length], bgp[length:]
adding = klass.decoder(value)
nlri.add(klass(operator, adding))
# logger.parser(LazyFormat("added flow %s (%s) operator %d len %d payload " % (klass.NAME,adding,byte,length),value))
return total - len(bgp), nlri
def unpack (cls, afi, safi, data, addpath, nexthop, action): labels,rd,path_identifier,mask,size,prefix,left = NLRI._nlri(afi,safi,data,action,addpath) nlri = cls(afi,safi,prefix,mask,nexthop,action) if path_identifier: nlri.path_info = PathInfo(None,None,path_identifier) return len(data) - len(left),nlri
