def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated):
ofmsgs = []
if is_updated:
self.logger.info(
'Updating next hop for route %s via %s (%s) on VLAN %u' %
(ip_dst, ip_gw, eth_dst, vlan.vid))
ofmsgs.extend(self._del_route_flows(vlan, ip_dst))
else:
self.logger.info('Adding new route %s via %s (%s) on VLAN %u' %
(ip_dst, ip_gw, eth_dst, vlan.vid))
if self.use_group_table:
inst = [
valve_of.apply_actions([
valve_of.group_act(
group_id=self._group_id_from_ip_gw(vlan, ip_gw))
])
]
else:
inst = [
valve_of.apply_actions(self._nexthop_actions(eth_dst, vlan)),
valve_of.goto_table(self.eth_dst_table)
]
for routed_vlan in self._routed_vlans(vlan):
in_match = self._route_match(routed_vlan, ip_dst)
ofmsgs.append(
self.fib_table.flowmod(in_match,
priority=self._route_priority(ip_dst),
inst=inst))
return ofmsgs
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated):
ofmsgs = []
in_match = self.valve_in_match(self.fib_table,
vlan=vlan,
eth_type=self._eth_type(),
nw_dst=ip_dst)
prefixlen = ipaddr.IPNetwork(ip_dst).prefixlen
priority = self.route_priority + prefixlen
if is_updated:
self.logger.info('Updating next hop for route %s via %s (%s)',
ip_dst, ip_gw, eth_dst)
ofmsgs.extend(
self.valve_flowdel(self.fib_table, in_match,
priority=priority))
else:
self.logger.info('Adding new route %s via %s (%s)', ip_dst, ip_gw,
eth_dst)
if self.use_group_table:
inst = [
valve_of.apply_actions([
valve_of.group_act(group_id=self.ip_gw_to_group_id[ip_gw])
])
]
else:
inst = [
valve_of.apply_actions(self._nexthop_actions(eth_dst)),
valve_of.goto_table(self.eth_dst_table)
]
ofmsgs.append(
self.valve_flowmod(self.fib_table,
in_match,
priority=priority,
inst=inst))
return ofmsgs
def build_output_actions(output_dict):
"""Implement actions to alter packet/output."""
output_actions = []
output_port = None
ofmsgs = []
# if destination rewriting selected, rewrite it.
if 'dl_dst' in output_dict:
output_actions.append(valve_of.set_eth_dst(output_dict['dl_dst']))
# rewrite any VLAN headers.
vlan_actions = rewrite_vlan(output_dict)
if vlan_actions:
output_actions.extend(vlan_actions)
if 'port' in output_dict:
output_port = output_dict['port']
output_actions.append(valve_of.output_port(output_port))
if 'failover' in output_dict:
failover = output_dict['failover']
group_id = failover['group_id']
buckets = []
for port in failover['ports']:
buckets.append(
valve_of.bucket(watch_port=port,
actions=[valve_of.output_port(port)]))
ofmsgs.append(valve_of.groupdel(group_id=group_id))
ofmsgs.append(valve_of.groupadd_ff(group_id=group_id, buckets=buckets))
output_actions.append(valve_of.group_act(group_id=group_id))
return (output_port, output_actions, ofmsgs)
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated):
ofmsgs = []
if self.routers:
in_match = self._route_match(AnyVlan(), ip_dst)
else:
in_match = self._route_match(vlan, ip_dst)
if is_updated:
self.logger.info('Updating next hop for route %s via %s (%s)',
ip_dst, ip_gw, eth_dst)
ofmsgs.extend(self._del_route_flows(vlan, ip_dst))
else:
self.logger.info('Adding new route %s via %s (%s)', ip_dst, ip_gw,
eth_dst)
if self.use_group_table:
inst = [
valve_of.apply_actions([
valve_of.group_act(group_id=self.ip_gw_to_group_id[ip_gw])
])
]
else:
inst = [
valve_of.apply_actions(self._nexthop_actions(eth_dst, vlan)),
valve_of.goto_table(self.eth_dst_table)
]
ofmsgs.append(
self.valve_flowmod(self.fib_table,
in_match,
priority=self._route_priority(ip_dst),
inst=inst))
return ofmsgs
def _add_resolved_route(self, vlan, ip_gw, ip_dst, eth_dst, is_updated=None):
ofmsgs = []
if is_updated is not None:
in_match = self.valve_in_match(
self.fib_table, vlan=vlan,
eth_type=self._eth_type(), nw_dst=ip_dst)
prefixlen = ipaddr.IPNetwork(ip_dst).prefixlen
priority = self.route_priority + prefixlen
if is_updated:
self.logger.info(
'Updating next hop for route %s via %s (%s)',
ip_dst, ip_gw, eth_dst)
ofmsgs.extend(self.valve_flowdel(
self.fib_table,
in_match,
priority=priority))
else:
self.logger.info(
'Adding new route %s via %s (%s)',
ip_dst, ip_gw, eth_dst)
if self.use_group_table:
inst = [valve_of.apply_actions([valve_of.group_act(
group_id=self.ip_gw_to_group_id[ip_gw])])]
else:
inst = [valve_of.apply_actions(self._nexthop_actions(eth_dst)),
valve_of.goto_table(self.eth_dst_table)]
ofmsgs.append(self.valve_flowmod(
self.fib_table,
in_match,
priority=priority,
inst=inst))
return ofmsgs
def _build_group_flood_rules(self, vlan, modify, command):
flood_priority = self.flood_priority
broadcast_group = self.groups.get_entry(
vlan.vid, self._build_group_buckets(vlan, False))
unicast_group = self.groups.get_entry(
vlan.vid + valve_of.VLAN_GROUP_OFFSET,
self._build_group_buckets(vlan, vlan.unicast_flood))
ofmsgs = []
if modify:
ofmsgs.append(broadcast_group.modify())
ofmsgs.append(unicast_group.modify())
else:
ofmsgs.extend(broadcast_group.add())
ofmsgs.extend(unicast_group.add())
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
group = broadcast_group
if not eth_dst:
group = unicast_group
match = self.flood_table.match(vlan=vlan,
eth_dst=eth_dst,
eth_dst_mask=eth_dst_mask)
ofmsgs.append(
self.flood_table.flowmod(
match=match,
command=command,
inst=[
valve_of.apply_actions(
[valve_of.group_act(group.group_id)])
],
priority=flood_priority))
flood_priority += 1
return ofmsgs
def build_flood_rules(self, vlan, modify=False):
"""Add flows to flood packets to unknown destinations on a VLAN."""
# TODO: not all vendors implement groups well.
# That means we need flood rules for each input port, outputting
# to all ports except the input port. When all vendors implement
# groups correctly we can use them.
command = ofp.OFPFC_ADD
group_mod_method = valve_of.groupadd
if modify:
command = ofp.OFPFC_MODIFY_STRICT
group_mod_method = valve_of.groupmod
flood_priority = self.flood_priority
ofmsgs = []
broadcast_buckets = []
unicast_buckets = []
if self.use_group_table and self.stack is None:
# Group table usage is not supported for stacking yet
# TODO: implement stacking using group table
broadcast_buckets = self._build_group_buckets(vlan, False)
unicast_buckets = self._build_group_buckets(vlan, vlan.unicast_flood)
group_id = vlan.vid
ofmsgs.append(group_mod_method(
group_id=group_id,
buckets=broadcast_buckets))
ofmsgs.append(group_mod_method(
group_id=group_id+valve_of.VLAN_GROUP_OFFSET,
buckets=unicast_buckets))
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
group_id = vlan.vid
if not eth_dst:
group_id = group_id + valve_of.VLAN_GROUP_OFFSET
match = self.valve_in_match(
self.flood_table, vlan=vlan,
eth_dst=eth_dst, eth_dst_mask=eth_dst_mask)
ofmsgs.append(self.valve_flowmod(
self.flood_table,
match=match,
command=command,
inst=[valve_of.apply_actions([valve_of.group_act(group_id)])],
priority=flood_priority))
flood_priority += 1
else:
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
ofmsgs.extend(self._build_unmirrored_flood_rules(
vlan, eth_dst, eth_dst_mask,
unicast_eth_dst, command, flood_priority))
flood_priority += 1
ofmsgs.extend(self._build_mirrored_flood_rules(
vlan, eth_dst, eth_dst_mask,
unicast_eth_dst, command, flood_priority))
flood_priority += 1
return ofmsgs
def build_flood_rules(self, vlan, modify=False):
"""Add flows to flood packets to unknown destinations on a VLAN."""
# TODO: not all vendors implement groups well.
# That means we need flood rules for each input port, outputting
# to all ports except the input port. When all vendors implement
# groups correctly we can use them.
command = ofp.OFPFC_ADD
group_mod_method = valve_of.groupadd
if modify:
command = ofp.OFPFC_MODIFY_STRICT
group_mod_method = valve_of.groupmod
flood_priority = self.flood_priority
ofmsgs = []
broadcast_buckets = []
unicast_buckets = []
if self.use_group_table and self.stack is None:
# Group table usage is not supported for stacking yet
# TODO: implement stacking using group table
broadcast_buckets = self._build_group_buckets(vlan, False)
unicast_buckets = self._build_group_buckets(vlan, vlan.unicast_flood)
group_id = vlan.vid
ofmsgs.append(group_mod_method(
group_id=group_id,
buckets=broadcast_buckets))
ofmsgs.append(group_mod_method(
group_id=group_id+valve_of.VLAN_GROUP_OFFSET,
buckets=unicast_buckets))
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
group_id = vlan.vid
if not eth_dst:
group_id = group_id + valve_of.VLAN_GROUP_OFFSET
match = self.valve_in_match(
self.flood_table, vlan=vlan,
eth_dst=eth_dst, eth_dst_mask=eth_dst_mask)
ofmsgs.append(self.valve_flowmod(
self.flood_table,
match=match,
command=command,
inst=[valve_of.apply_actions([valve_of.group_act(group_id)])],
priority=flood_priority))
flood_priority += 1
else:
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
ofmsgs.extend(self._build_unmirrored_flood_rules(
vlan, eth_dst, eth_dst_mask,
unicast_eth_dst, command, flood_priority))
flood_priority += 1
ofmsgs.extend(self._build_mirrored_flood_rules(
vlan, eth_dst, eth_dst_mask,
unicast_eth_dst, command, flood_priority))
flood_priority += 1
return ofmsgs
def _build_group_flood_rules(self, vlan, modify, command):
flood_priority = self.flood_priority
broadcast_buckets = self._build_group_buckets(vlan, False)
unicast_buckets = self._build_group_buckets(vlan, vlan.unicast_flood)
group_id = vlan.vid
ofmsgs = []
group_mod_method = valve_of.groupadd
if modify:
group_mod_method = valve_of.groupmod
else:
ofmsgs.append(valve_of.groupdel(group_id=group_id))
ofmsgs.append(
valve_of.groupdel(group_id=group_id +
valve_of.VLAN_GROUP_OFFSET))
ofmsgs.append(
group_mod_method(group_id=group_id, buckets=broadcast_buckets))
ofmsgs.append(
group_mod_method(group_id=group_id + valve_of.VLAN_GROUP_OFFSET,
buckets=unicast_buckets))
for unicast_eth_dst, eth_dst, eth_dst_mask in self.FLOOD_DSTS:
if unicast_eth_dst and not vlan.unicast_flood:
continue
group_id = vlan.vid
if not eth_dst:
group_id = group_id + valve_of.VLAN_GROUP_OFFSET
match = self.valve_in_match(self.flood_table,
vlan=vlan,
eth_dst=eth_dst,
eth_dst_mask=eth_dst_mask)
ofmsgs.append(
self.valve_flowmod(self.flood_table,
match=match,
command=command,
inst=[
valve_of.apply_actions(
[valve_of.group_act(group_id)])
],
priority=flood_priority))
flood_priority += 1
return ofmsgs
