def mpls (tokeniser): ipmask = prefix(tokeniser) mpls = MPLS( afi=IP.toafi(ipmask.top()), safi=IP.tosafi(ipmask.top()), action=OUT.UNSET ) mpls.cidr = CIDR(ipmask.ton(),ipmask.mask) return Change( mpls, Attributes() )
def route (tokeniser):
ipmask = prefix(tokeniser)
if 'rd' in tokeniser.tokens or 'route-distinguisher' in tokeniser.tokens:
nlri = MPLS(IP.toafi(ipmask.top()),SAFI.mpls_vpn,OUT.ANNOUNCE)
elif 'label' in tokeniser.tokens:
nlri = Label(IP.toafi(ipmask.top()),SAFI.nlri_mpls,OUT.ANNOUNCE)
else:
nlri = INET(IP.toafi(ipmask.top()),IP.tosafi(ipmask.top()),OUT.ANNOUNCE)
nlri.cidr = CIDR(ipmask.pack(),ipmask.mask)
change = Change(
nlri,
Attributes()
)
while True:
command = tokeniser()
if not command:
break
action = ParseStatic.action[command]
if action == 'attribute-add':
change.attributes.add(ParseStatic.known[command](tokeniser))
elif action == 'nlri-set':
change.nlri.assign(ParseStatic.assign[command],ParseStatic.known[command](tokeniser))
elif action == 'nexthop-and-attribute':
nexthop,attribute = ParseStatic.known[command](tokeniser)
change.nlri.nexthop = nexthop
change.attributes.add(attribute)
else:
raise ValueError('route: unknown command "%s"' % command)
return list(ParseStatic.split(change))
def attributes (tokeniser):
ipmask = prefix(lambda: tokeniser.tokens[-1])
if 'rd' in tokeniser.tokens or 'route-distinguisher' in tokeniser.tokens:
nlri = MPLS(IP.toafi(ipmask.top()),SAFI.mpls_vpn,OUT.ANNOUNCE)
elif 'label' in tokeniser.tokens:
nlri = Label(IP.toafi(ipmask.top()),SAFI.nlri_mpls,OUT.ANNOUNCE)
else:
nlri = INET(IP.toafi(ipmask.top()),IP.tosafi(ipmask.top()),OUT.ANNOUNCE)
nlri.cidr = CIDR(ipmask.pack(),ipmask.mask)
change = Change(
nlri,
Attributes()
)
while True:
command = tokeniser()
if not command:
return []
if command == 'nlri':
break
action = ParseStatic.action[command]
if action == 'attribute-add':
change.attributes.add(ParseStatic.known[command](tokeniser))
elif action == 'nlri-set':
change.nlri.assign(ParseStatic.assign[command],ParseStatic.known[command](tokeniser))
elif action == 'nexthop-and-attribute':
nexthop,attribute = ParseStatic.known[command](tokeniser)
change.nlri.nexthop = nexthop
change.attributes.add(attribute)
else:
raise ValueError('route: unknown command "%s"' % command)
attributes = change.attributes
nexthop = change.nlri.nexthop
changes = []
while True:
nlri = tokeniser.peek()
if not nlri:
break
ipmask = prefix(tokeniser)
new = Change(
change.nlri.__class__(
change.nlri.afi,
change.nlri.safi,
OUT.UNSET
),
attributes
)
new.nlri.cidr = CIDR(ipmask.pack(),ipmask.mask)
new.nlri.nexthop = nexthop
changes.append(new)
return changes