def create_discovery_packet(self, dpid, port_num, port_addr):
"""
Build discovery packet
"""
chassis_id = pkt.chassis_id(subtype=pkt.chassis_id.SUB_LOCAL)
chassis_id.id = bytes('dpid:' + hex(long(dpid))[2:-1])
# Maybe this should be a MAC. But a MAC of what? Local port, maybe?
port_id = pkt.port_id(subtype=pkt.port_id.SUB_PORT, id=str(port_num))
ttl = pkt.ttl(ttl=self._ttl)
sysdesc = pkt.system_description()
sysdesc.payload = bytes('dpid:' + hex(long(dpid))[2:-1])
discovery_packet = pkt.lldp()
discovery_packet.tlvs.append(chassis_id)
discovery_packet.tlvs.append(port_id)
discovery_packet.tlvs.append(ttl)
discovery_packet.tlvs.append(sysdesc)
discovery_packet.tlvs.append(pkt.end_tlv())
eth = pkt.ethernet(type=pkt.ethernet.LLDP_TYPE)
eth.src = port_addr
eth.dst = pkt.ETHERNET.NDP_MULTICAST
eth.payload = discovery_packet
po = of.ofp_packet_out(action=of.ofp_action_output(port=port_num))
po.data = eth.pack()
return po.pack()
def create_discovery_packet (self, dpid, port_num, port_addr):
"""
Build discovery packet
"""
chassis_id = pkt.chassis_id(subtype=pkt.chassis_id.SUB_LOCAL)
chassis_id.id = bytes('dpid:' + hex(long(dpid))[2:-1])
# Maybe this should be a MAC. But a MAC of what? Local port, maybe?
port_id = pkt.port_id(subtype=pkt.port_id.SUB_PORT, id=str(port_num))
ttl = pkt.ttl(ttl = self._ttl)
sysdesc = pkt.system_description()
sysdesc.payload = bytes('dpid:' + hex(long(dpid))[2:-1])
discovery_packet = pkt.lldp()
discovery_packet.tlvs.append(chassis_id)
discovery_packet.tlvs.append(port_id)
discovery_packet.tlvs.append(ttl)
discovery_packet.tlvs.append(sysdesc)
discovery_packet.tlvs.append(pkt.end_tlv())
eth = pkt.ethernet(type=pkt.ethernet.LLDP_TYPE)
eth.src = port_addr
eth.dst = pkt.ETHERNET.NDP_MULTICAST
eth.payload = discovery_packet
po = of.ofp_packet_out(action = of.ofp_action_output(port=port_num))
po.data = eth.pack()
return po.pack()
def install_flow(self, con_or_dpid, priority=None):
if priority is None:
priority = self._flow_priority
if isinstance(con_or_dpid, (int, long)):
con = core.openflow.connections.get(con_or_dpid)
if con is None:
log.warn("Can't install flow for %s", dpid_to_str(con_or_dpid))
return False
else:
con = con_or_dpid
match = of.ofp_match(dl_type=pkt.ethernet.LLDP_TYPE,
dl_dst=pkt.ETHERNET.NDP_MULTICAST)
msg = of.ofp_flow_mod()
msg.priority = priority
msg.match = match
msg.actions.append(of.ofp_action_output(port=of.OFPP_CONTROLLER))
con.send(msg)
return True
def install_flow (self, con_or_dpid, priority = None):
if priority is None:
priority = self._flow_priority
if isinstance(con_or_dpid, (int,long)):
con = core.openflow.connections.get(con_or_dpid)
if con is None:
log.warn("Can't install flow for %s", dpid_to_str(con_or_dpid))
return False
else:
con = con_or_dpid
match = of.ofp_match(dl_type = pkt.ethernet.LLDP_TYPE,
dl_dst = pkt.ETHERNET.NDP_MULTICAST)
msg = of.ofp_flow_mod()
msg.priority = priority
msg.match = match
msg.actions.append(of.ofp_action_output(port = of.OFPP_CONTROLLER))
con.send(msg)
return True
