def packet_in_handler(self, ev):
"""
EventHandler for PacketIn messages
"""
msg = ev.msg
# In OpenFlow, switches are called "datapaths". Each switch gets its own datapath ID.
# In the controller, we pass around datapath objects with metadata about each switch.
dp = msg.datapath
# Use this object to create packets for the given datapath
ofctl = OfCtl.factory(dp, self.logger)
in_port = msg.in_port
pkt = packet.Packet(msg.data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
if eth.ethertype == ether_types.ETH_TYPE_ARP:
arp_msg = pkt.get_protocols(arp.arp)[0]
if arp_msg.opcode == arp.ARP_REQUEST:
self.logger.warning(
"Received ARP REQUEST on switch%d/%d: Who has %s? Tell %s",
dp.id, in_port, arp_msg.dst_ip, arp_msg.src_mac)
def add_forwarding_rule(self, datapath, dl_dst, port):
ofctl = OfCtl.factory(datapath, self.logger)
actions = [datapath.ofproto_parser.OFPActionOutput(port)]
ofctl.set_flow(cookie=0, priority=0, dl_type=ether_types.ETH_TYPE_IP, dl_vlan=VLANID_NONE, dl_dst=dl_dst,
actions=actions)
print('forwarding_rule:\n switch:%s\n dl_dst: %s\n port: %s' %
(datapath.id, dl_dst, port))
def add_forwaring_rule(self, datapath, dl_dst, port):
ofctl = OfCtl.factory(datapath, self.logger)
actions = [datapath.ofproto_parser.OFPActionOutput(port)]
ofctl.set_flow(cookie=0,
priority=100,
dl_vlan=VLANID_NONE,
dl_dst=dl_dst,
actions=actions)
def add_forwaring_rule(self, datapath, dl_dst, port):
'''
datapath: switch instance <- ofctl_api.get_datapath(self, dpid=host.port.dpid)
dl_dst: dest mac addr
port: out interface (1,2,3,4...)
'''
ofctl = OfCtl.factory(datapath, self.logger)
actions = [datapath.ofproto_parser.OFPActionOutput(port)]
ofctl.set_flow(cookie=0,
priority=0,
dl_type=ether_types.ETH_TYPE_IP,
dl_vlan=VLANID_NONE,
dl_dst=dl_dst,
actions=actions)
def packet_in_handler(self, ev):
"""
EventHandler for PacketIn messages
"""
msg = ev.msg
# In OpenFlow, switches are called "datapaths". Each switch gets its own datapath ID.
# In the controller, we pass around datapath objects with metadata about each switch.
dp = msg.datapath
# Use this object to create packets for the given datapath
ofctl = OfCtl.factory(dp, self.logger)
in_port = msg.in_port
pkt = packet.Packet(msg.data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
if eth.ethertype == ether_types.ETH_TYPE_ARP:
arp_msg = pkt.get_protocols(arp.arp)[0]
if arp_msg.opcode == arp.ARP_REQUEST:
self.logger.warning(
"Received ARP REQUEST on switch%d/%d: Who has %s? Tell %s",
dp.id, in_port, arp_msg.dst_ip, arp_msg.src_mac)
# TODO: Generate a *REPLY* for this request based on your switch state
# Here is an example way to send an ARP packet using the ofctl utilities
# ofctl.send_arp(vlan_id=VLANID_NONE,
# src_port=ofctl.dp.ofproto.OFPP_CONTROLLER,
# . . .)
if arp_msg.dst_ip in self.mac_table:
ofctl.send_arp(arp_opcode=arp.ARP_REPLY,
vlan_id=VLANID_NONE,
dst_mac=self.mac_table[arp_msg.src_ip],
sender_mac=self.mac_table[arp_msg.dst_ip],
sender_ip=arp_msg.dst_ip,
target_ip=arp_msg.src_ip,
target_mac=arp_msg.src_mac,
src_port=ofctl.dp.ofproto.OFPP_CONTROLLER,
output_port=in_port)
def rules_update(self):
for i in self.tm.all_devices:
if isinstance(i, TMHost):
for point, num_port in i.path:
point.actions = []
self.delete_forwarding_rule(point.get_dp(), "00:00:00:00:00:00")
for i in self.tm.all_devices:
if isinstance(i, TMHost):
for point, num_port in i.path:
point.flag = False
self.delete_forwarding_rule(point.get_dp(), i.get_mac())
self.add_forwarding_rule(point.get_dp(), i.get_mac(), num_port)
datapath = point.get_dp()
point.actions += [datapath.ofproto_parser.OFPActionOutput(num_port)]
#self.add_forwarding_rule(point.get_dp(), "00:00:00:00:00:00", num_port)
for i in self.tm.all_devices:
if isinstance(i, TMHost):
for point, num_port in i.path:
if not point.flag:
point.flag = True
ofctl = OfCtl.factory(point.get_dp(), self.logger)
ofctl.set_flow(cookie=0, priority=0, dl_type=ether_types.ETH_TYPE_IP, dl_vlan=VLANID_NONE, dl_dst="00:00:00:00:00:00", actions=point.actions)
def packet_in_handler(self, ev):
"""
EventHandler for PacketIn messages
"""
msg = ev.msg
# In OpenFlow, switches are called "datapaths". Each switch gets its own datapath ID.
# In the controller, we pass around datapath objects with metadata about each switch.
dp = msg.datapath
# Use this object to create packets for the given datapath
ofctl = OfCtl.factory(dp, self.logger)
in_port = msg.in_port
pkt = packet.Packet(msg.data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
if eth.ethertype == ether_types.ETH_TYPE_ARP:
arp_msg = pkt.get_protocols(arp.arp)[0]
if arp_msg.opcode == arp.ARP_REQUEST:
self.logger.warning(
"Received ARP REQUEST on switch%d/%d: Who has %s? Tell %s,ip:%s,opcode:%s",
dp.id, in_port, arp_msg.dst_ip, arp_msg.src_mac,
arp_msg.src_ip, arp_msg.opcode)
self.logger.warning(arp_msg)
"""
Generate an ARP packet and send it
Arguments:
arp_opcode -- Opcode for message
vlan_id -- VLAN identifier, or VLANID_NONE
dst_mac -- Destination to send the packet (not an ARP field)
sender_mac -- Sender hardware address
sender_ip -- Sender protocol address
target_mac -- Target hardware address
target_ip -- Target protocol address
src_port -- Source port number for sending message (can be OFPP_CONTROLLER)
output_port -- Outgoing port number to send message
"""# src 出发,dst收尾
reply_mac = None
for i in self.tm.hostes:
print(i.host.ipv4)
if i.host.ipv4[0] == arp_msg.dst_ip:
reply_mac = i.mac
break
print("reply is {}".format(reply_mac))
if reply_mac is None:
return
else:
ofctl.send_arp(
arp_opcode=2,
vlan_id=VLANID_NONE,
dst_mac=arp_msg.src_mac,
sender_mac=reply_mac,
sender_ip=arp_msg.dst_ip,
target_mac=arp_msg.src_mac,
target_ip=arp_msg.src_ip,
src_port=ofctl.dp.ofproto.OFPP_CONTROLLER,
#src_port=in_port,
output_port=in_port)
print("send finish")
for i in self.tm.switches:
for j in i.neighbors:
print(i.name, j[0].name, j[1])
# for j in i.host:
# print(i.name,j.name,j.host.port.port_no)
self.BFS_1()
def delete_forwarding_rule(self, datapath, dl_dst):
ofctl = OfCtl.factory(datapath, self.logger)
match = datapath.ofproto_parser.OFPMatch(dl_dst=dl_dst)
ofctl.delete_flow(cookie=0, priority=0, match=match)
def packet_in_handler(self, ev):
"""
EventHandler for PacketIn messages
"""
msg = ev.msg
pkt = packet.Packet(data=msg.data)
pkt_ethernet = pkt.get_protocol(ethernet.ethernet)
if not pkt_ethernet:
return
if pkt_ethernet.ethertype == 35020:
return
# In OpenFlow, switches are called "datapaths". Each switch gets its own datapath ID.
# In the controller, we pass around datapath objects with metadata about each switch.
dp = msg.datapath
# Use this object to create packets for the given datapath
ofctl = OfCtl.factory(dp, self.logger)
in_port = msg.in_port
pkt = packet.Packet(msg.data)
eth = pkt.get_protocols(ethernet.ethernet)[0]
if eth.ethertype == ether_types.ETH_TYPE_ARP:
# print('arp packet in!!')
arp_msg = pkt.get_protocols(arp.arp)[0]
if arp_msg.opcode == arp.ARP_REQUEST:
self.logger.warning("Received ARP REQUEST on switch%d/%d: Who has %s? Tell %s",
dp.id, in_port, arp_msg.dst_ip, arp_msg.src_mac)
# Generate a *REPLY* for this request based on your switch state
result_mac = self.tm.get_mac_by_ip(arp_msg.dst_ip)
if result_mac is not None:
# 如果mac地址存在，则返回包
print('%s to %s' % (arp_msg.dst_ip, result_mac))
ofctl.send_arp(arp_opcode=arp.ARP_REPLY,
vlan_id=VLANID_NONE,
dst_mac=arp_msg.src_mac,
sender_mac=result_mac,
sender_ip=arp_msg.dst_ip,
target_mac=arp_msg.src_mac,
target_ip=arp_msg.src_ip,
src_port=ofctl.dp.ofproto.OFPP_CONTROLLER,
output_port=msg.in_port)
self.tm.print_shortest_path(arp_msg.src_mac, result_mac)
else:
if not self.loop_mode:
print('this mac not exits.')
return
# 如果mac地址不存在，则泛洪
msg = ev.msg
data = msg.data
datapath = msg.datapath
# print(dp.id)
ofproto = datapath.ofproto
ofp_parser = datapath.ofproto_parser
if self.sp_mode:
if "switch_{}".format(dp.id) in self.port_map.keys():
actions = []
for p in self.port_map["switch_{}".format(dp.id)]:
if p != msg.in_port:
# print(msg.in_port, p)
actions.append(ofp_parser.OFPActionOutput(p))
else:
actions = [ofp_parser.OFPActionOutput(ofproto.OFPP_FLOOD)]
else:
actions = [ofp_parser.OFPActionOutput(ofproto.OFPP_FLOOD)]
out = ofp_parser.OFPPacketOut(
datapath=datapath, buffer_id=msg.buffer_id, in_port=msg.in_port,
actions=actions, data=data)
datapath.send_msg(out)
