def link_loop(self):
while self.is_active:
self.link_event.clear()
now = time.time()
deleted = []
inter_deleted = []
for (link, timestamp) in self.links.items():
# LOG.debug('%s timestamp %d (now %d)', link, timestamp, now)
if timestamp + self.LINK_TIMEOUT < now:
src = link.src
if src in self.ports:
port_data = self.ports.get_port(src)
# LOG.debug('port_data %s', port_data)
if port_data.lldp_dropped() > self.LINK_LLDP_DROP:
deleted.append(link)
for (link, timestamp) in self.inter_links.items():
# LOG.debug('%s timestamp %d (now %d)', link, timestamp, now)
if timestamp + self.LINK_TIMEOUT < now:
src = link.dst
if src in self.ports:
port_data = self.ports.get_port(src)
# LOG.debug('port_data %s', port_data)
if port_data.lldp_dropped() > self.LINK_LLDP_DROP:
inter_deleted.append(link)
#'''
for host in self.hosts.values():
host_port = host.port
dst_port = link.dst
if host_port.dpid == dst_port.dpid and host_port.port_no == dst_port.port_no:
del self.hosts[host.mac]
ev = event.EventHostDelete(host)
self.send_event_to_observers(ev)
#'''
for link in inter_deleted:
self.inter_links.link_down(link)
# LOG.debug('delete %s', link)
self.send_event_to_observers(event.EventLinkDelete(link))
for link in deleted:
self.links.link_down(link)
# LOG.debug('delete %s', link)
self.send_event_to_observers(event.EventLinkDelete(link))
dst = link.dst
rev_link = Link(dst, link.src)
if rev_link not in deleted:
# It is very likely that the reverse link is also
# disconnected. Check it early.
expire = now - self.LINK_TIMEOUT
self.links.rev_link_set_timestamp(rev_link, expire)
if dst in self.ports:
self.ports.move_front(dst)
self.lldp_event.set()
self.link_event.wait(timeout=self.TIMEOUT_CHECK_PERIOD)
def _link_down(self, port):
try:
dst, rev_link_dst = self.links.port_deleted(port)
except KeyError:
# LOG.debug('key error. src=%s, dst=%s',
# port, self.links.get_peer(port))
return
link = Link(port, dst)
self.send_event_to_observers(event.EventLinkDelete(link))
if rev_link_dst:
rev_link = Link(dst, rev_link_dst)
self.send_event_to_observers(event.EventLinkDelete(rev_link))
self.ports.move_front(dst)
def link_loop(self):
while self.is_active:
self.link_event.clear()
now = time.time()
deleted = []
for (link, timestamp) in self.links.items():
# LOG.debug('%s timestamp %d (now %d)', link, timestamp, now)
if timestamp + self.LINK_TIMEOUT < now:
deleted.append(link)
for link in deleted:
self.links.link_down(link)
# LOG.debug('delete %s', link)
self.send_event_to_observers(event.EventLinkDelete(link))
dst = link.dst
rev_link = Link(dst, link.src)
if rev_link not in deleted:
# It is very likely that the reverse link is also
# disconnected. Check it early.
expire = now - self.LINK_TIMEOUT
self.links.rev_link_set_timestamp(rev_link, expire)
if dst in self.ports:
self.ports.move_front(dst)
self.lldp_event.set()
self.link_event.wait(timeout=self.TIMEOUT_CHECK_PERIOD)
def _inter_link_down(self, port):
for inter_link in self.inter_links:
dst = inter_link.dst
if dst.dpid == port.dpid and dst.port_no == port.port_no:
print "inter link down :find port"
print inter_link
del self.inter_links[inter_link.src]
self.send_event_to_observers(event.EventLinkDelete(inter_link))
def lldp_packet_in_handler(self, ev):
if not self.link_discovery:
return
msg = ev.msg
try:
src_dpid, src_port_no = LLDPPacket.lldp_parse(msg.data)
except LLDPPacket.LLDPUnknownFormat as e:
# This handler can receive all the packtes which can be
# not-LLDP packet. Ignore it silently
return
dst_dpid = msg.datapath.id
if msg.datapath.ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
dst_port_no = msg.in_port
elif msg.datapath.ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
dst_port_no = msg.match['in_port']
else:
LOG.error('cannot accept LLDP. unsupported version. %x',
msg.datapath.ofproto.OFP_VERSION)
src = self._get_port(src_dpid, src_port_no)
if not src or src.dpid == dst_dpid:
return
try:
self.ports.lldp_received(src)
except KeyError:
# There are races between EventOFPPacketIn and
# EventDPPortAdd. So packet-in event can happend before
# port add event. In that case key error can happend.
# LOG.debug('lldp_received: KeyError %s', e)
pass
dst = self._get_port(dst_dpid, dst_port_no)
if not dst:
return
old_peer = self.links.get_peer(src)
# LOG.debug("Packet-In")
# LOG.debug(" src=%s", src)
# LOG.debug(" dst=%s", dst)
# LOG.debug(" old_peer=%s", old_peer)
if old_peer and old_peer != dst:
old_link = Link(src, old_peer)
self.send_event_to_observers(event.EventLinkDelete(old_link))
link = Link(src, dst)
if link not in self.links:
self.send_event_to_observers(event.EventLinkAdd(link))
if not self.links.update_link(src, dst):
# reverse link is not detected yet.
# So schedule the check early because it's very likely it's up
self.ports.move_front(dst)
self.lldp_event.set()
if self.explicit_drop:
self._drop_packet(msg)
def lldp_packet_in_handler(self, ev):
if not self.link_discovery:
return
msg = ev.msg
try:
src_dpid, src_port_no = LLDPPacket.lldp_parse(msg.data)
except LLDPPacket.LLDPUnknownFormat:
# This handler can receive all the packets which can be
# not-LLDP packet. Ignore it silently
return
dst_dpid = msg.datapath.id
if msg.datapath.ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
dst_port_no = msg.in_port
elif msg.datapath.ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
dst_port_no = msg.match['in_port']
else:
LOG.error('cannot accept LLDP. unsupported version. %x',
msg.datapath.ofproto.OFP_VERSION)
src = self._get_port(src_dpid, src_port_no)
if not src or src.dpid == dst_dpid:
for links in self.interLinks:
if src_dpid == int(links.split(',')[0]) and dst_dpid == int(
links.split(',')[1]):
self.sendCfgMessage()
tmpStr = str(src_dpid) + ',' + str(dst_dpid) + ',' + str(
src_port_no) + ',' + str(dst_port_no) + ',' + str(0) + '#'
self.interLinks.append(tmpStr)
return
try:
self.ports.lldp_received(src)
except KeyError:
# There are races between EventOFPPacketIn and
# EventDPPortAdd. So packet-in event can happend before
# port add event. In that case key error can happend.
# LOG.debug('lldp_received error', exc_info=True)
pass
dst = self._get_port(dst_dpid, dst_port_no)
if not dst:
return
old_peer = self.links.get_peer(src)
# LOG.debug("Packet-In")
# LOG.debug(" src=%s", src)
# LOG.debug(" dst=%s", dst)
# LOG.debug(" old_peer=%s", old_peer)
if old_peer and old_peer != dst:
old_link = Link(src, old_peer)
del self.links[old_link]
self.send_event_to_observers(event.EventLinkDelete(old_link))
link = Link(src, dst)
if link not in self.links:
self.send_event_to_observers(event.EventLinkAdd(link))
# remove hosts if it's not attached to edge port
host_to_del = []
for host in self.hosts.values():
if not self._is_edge_port(host.port):
host_to_del.append(host.mac)
for host_mac in host_to_del:
del self.hosts[host_mac]
if not self.links.update_link(src, dst):
# reverse link is not detected yet.
# So schedule the check early because it's very likely it's up
self.ports.move_front(dst)
self.lldp_event.set()
if self.explicit_drop:
self._drop_packet(msg)
def lldp_packet_in_handler_for_interlink(self, ev):
LOG.debug("lldp_packet_in_handler_for_interlink")
if not self.link_discovery:
LOG.debug(
"lldp_packet_in_handler_for_interlink:link_discovert flag is false,return"
)
return
msg = ev.msg
try:
src_dpid, src_port_no = LLDPPacket.lldp_parse(msg.data)
except LLDPPacket.LLDPUnknownFormat as e:
# This handler can receive all the packets which can be
# not-LLDP packet. Ignore it silently
LOG.debug(
"lldp_packet_in_handler_for_interlink: lldp_parse error:")
LOG.debug(e)
return
dst_dpid = msg.datapath.id
if msg.datapath.ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
dst_port_no = msg.in_port
elif msg.datapath.ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
dst_port_no = msg.match['in_port']
else:
LOG.error('cannot accept LLDP. unsupported version. %x',
msg.datapath.ofproto.OFP_VERSION)
LOG.debug("lldp_packet_in_handler_for_interlink:get dpid")
src = self._get_port(src_dpid, src_port_no)
#if src is local handle it in lldp_packet_in_handler
if src:
LOG.debug(
"lldp_packet_in_handler_for_interlink: can find src port ,so its shouldn't be handled as interlink,return"
)
return
dst = self._get_port(dst_dpid, dst_port_no)
if not dst:
LOG.debug(
"lldp_packet_in_handler_for_interlink: can find dst port ,so why cant find dst port in local,fail and return"
)
return
# so now ,src is None, create a src port instance
#dst_json = json.dumps(dst, default=lambda obj: obj.__dict__)
src = dst.copy()
src.dpid = src_dpid
src.port_no = src_port_no
# change it to dst
try:
LOG.debug(
"lldp_packet_in_handler_for_interlink: set dst port send count as zero"
)
self.ports.lldp_received(dst)
except KeyError:
# There are races between EventOFPPacketIn and
# EventDPPortAdd. So packet-in event can happend before
# port add event. In that case key error can happend.
# LOG.debug('lldp_received: KeyError %s', e)
pass
old_peer = self.inter_links.get_peer(src)
# LOG.debug("Packet-In")
# LOG.debug(" src=%s", src)
# LOG.debug(" dst=%s", dst)
# LOG.debug(" old_peer=%s", old_peer)
if old_peer and old_peer != dst:
old_link = Link(src, old_peer)
del self.inter_links[old_link]
LOG.debug(
"lldp_packet_in_handler_for_interlink:find a old peer, delete the old link"
)
self.send_event_to_observers(event.EventLinkDelete(old_link))
# hanlde port form other domain,define port_no = dpid:port_no
# TODO we assume that dpid is unique, if not we shuold extend LLDP to add with cid(controller id)
LOG.debug("lldp_packet_in_handler_for_interlink:create interlink")
inter_link = Link(src, dst)
if inter_link not in self.inter_links:
LOG.debug("discover inter_link:-----------------")
LOG.debug(inter_link)
LOG.debug(
"lldp_packet_in_handler_for_interlink: send EventLinkAdd to observers"
)
self.send_event_to_observers(event.EventLinkAdd(inter_link))
# remove hosts from edge port
for host in self.hosts.values():
if self._is_domain_edge_port(host.port):
del self.hosts[host.mac]
print "delete host"
print host
ev = event.EventHostDelete(host)
self.send_event_to_observers(ev)
LOG.debug(
"lldp_packet_in_handler_for_interlink: update link state time")
self.inter_links.update_link(src, dst)
if self.explicit_drop:
self._drop_packet(msg)
def packet_in_handler(self, ev):
if not self.link_discovery:
return
msg = ev.msg
dp = msg.datapath
pkt = packet.Packet(array.array('B', msg.data))
for p in pkt:
try:
p.protocol_name
#ipv6 bug... TODO
except:
return
if p.protocol_name == 'lldp':
try:
src_dpid, src_port_no = LLDPPacket.lldp_parse(msg.data)
except LLDPPacket.LLDPUnknownFormat as e:
print('lldp miss')
# This handler can receive all the packtes which can be
# not-LLDP packet. Ignore it silently
return
dst_dpid = msg.datapath.id
dst_port_no = msg.in_port
src = self._get_port(src_dpid, src_port_no)
if not src or src.dpid == dst_dpid:
return
try:
self.ports.lldp_received(src)
except KeyError:
# There are races between EventOFPPacketIn and
# EventDPPortAdd. So packet-in event can happend before
# port add event. In that case key error can happend.
# LOG.debug('lldp_received: KeyError %s', e)
pass
self.create_graph_map()
dst = self._get_port(dst_dpid, dst_port_no)
if not dst:
return
#graph for spf
old_peer = self.links.get_peer(src)
# LOG.debug("Packet-In")
# LOG.debug(" src=%s", src)
# LOG.debug(" dst=%s", dst)
# LOG.debug(" old_peer=%s", old_peer)
if old_peer and old_peer != dst:
old_link = Link(src, old_peer)
self.send_event_to_observers(
event.EventLinkDelete(old_link))
link = Link(src, dst)
if not link in self.links:
self.send_event_to_observers(event.EventLinkAdd(link))
if not self.links.update_link(src, dst):
# reverse link is not detected yet.
# So schedule the check early because it's very likely it's up
self.ports.move_front(dst)
self.lldp_event.set()
if self.explicit_drop:
self._drop_packet(msg)
if p.protocol_name == 'arp':
#dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
dst, src, _eth_type = of_utils.unpack_ethernet(msg.data)
src_ip_addr = p.src_ip
dst_ip_addr = p.dst_ip
src_mac_addr = src
host_dpid = dp.id
host_port = msg.in_port
if (not src_ip_addr in self.arp_table
or self.arp_table[src_ip_addr] !=
(host_dpid, host_port, src_mac_addr)):
self.arp_table[src_ip_addr] = (host_dpid, host_port,
src_mac_addr)
rdb.set('arp_table', json.dumps(self.arp_table))
rdb.set('arp_table_pickled', pickle.dumps(self.arp_table))
if (not src_mac_addr in self.mac_table
or self.mac_table[src_mac_addr] !=
(host_dpid, host_port)):
self.mac_table[src_mac_addr] = (host_dpid, host_port)
rdb.set('mac_table', json.dumps(self.mac_table))
rdb.set('mac_table_pickled', pickle.dumps(self.mac_table))
if (dst_ip_addr in self.arp_table):
print('response')
arp_pkt = self.create_arp_response(src_ip_addr,
src_mac_addr,
dst_ip_addr)
actions = [dp.ofproto_parser.OFPActionOutput(host_port)]
dp.send_packet_out(actions=actions, data=arp_pkt)
self._drop_packet(msg)
return
#testing, everything thru the contoller
if p.protocol_name == 'ipv4':
if p.dst in self.arp_table:
dip = of_utils.unpack_ipv4(msg.data, of_utils.IPV4_DIP)
proto = p.proto
dmac = self.arp_table[p.dst][2]
sport = msg.in_port
if self.arp_table[p.dst][0] == dp.id:
print('same sw')
dport = self.arp_table[p.dst][1]
self.install_flow_dmac(dp, sport, dport, dmac)
#self._drop_packet(msg)
self.controller_send(dp, dport, msg.data)
return
dst_dpid = self.arp_table[p.dst][0]
dst_dp = self.dps[dst_dpid]
dst_port = self.arp_table[p.dst][1]
met, topo, topo_ecmp = NetGraph.SrcDst_SPF_ECMP(
self.graph_map, dp.id, dst_dpid)
print(topo)
print(topo_ecmp)
cntr = len(topo)
prev_node = dp
while cntr >= 1:
dport = self.graph_ports[prev_node.id][topo[cntr]]
# self.install_flow_dmac(prev_node,sport,dport,dmac)
self.install_flow_dip(prev_node, sport, dport, dip)
sport = self.graph_ports[topo[cntr]][prev_node.id]
prev_node = self.dps[topo[cntr]]
cntr -= 1
#self.install_flow_dmac(prev_node,sport,self.mac_table[dmac][1],dmac)
self.install_flow_dip(prev_node, sport,
self.arp_table[p.dst][1], dip)
print(p)
#self._drop_packet(msg)
self.controller_send(dst_dp, dst_port, msg.data)
self._drop_packet(msg)
return
if (p.protocol_name != 'arp' and p.protocol_name != 'lldp'
and p.protocol_name != 'ethernet'):
print(p)
def packet_in_handler(self, ev):
if not self.link_discovery:
return
#print 123111111111
msg = ev.msg
#print 'msg: ',msg.__dict__
try:
src_dpid, src_port_no = LLDPPacket.lldp_parse(msg.data)
except LLDPPacket.LLDPUnknownFormat as e:
# This handler can receive all the packtes which can be
# not-LLDP packet. Ignore it silently
return
dst_dpid = msg.datapath.id
if msg.datapath.ofproto.OFP_VERSION == ofproto_v1_0.OFP_VERSION:
dst_port_no = msg.in_port
elif msg.datapath.ofproto.OFP_VERSION >= ofproto_v1_2.OFP_VERSION:
dst_port_no = msg.match['in_port']
else:
LOG.error('cannot accept LLDP. unsupported version. %x',
msg.datapath.ofproto.OFP_VERSION)
src = self._get_port(src_dpid, src_port_no)
# print 'src: ',src.__dict__
# print 'type: ',type(src)
#linshixiugai
if not src:
if self._get_port(517, 26):
src = self._get_port(517, 26)
if self._get_port(770, 8):
src = self._get_port(770, 8)
src.dpid = src_dpid
src.port_no = src_port_no
src.name = 'ge-1/1/' + str(src_port_no)
#this need to be improved,because LLDP from another domain can only be parsered to
#dpid and portNo ,other information ,such as name,can't be parsered.So we can only
#made this port by ourselves,not by program.
#print src.__dict__
if src.dpid == dst_dpid:
return
# if src_dpid not in self.dps:
# src = Port(src_dpid, None, None)
# src.port_no = src_port_no
# else:
# src = self._get_port(src_dpid, src_port_no)
try:
self.ports.lldp_received(src)
except KeyError:
# There are races between EventOFPPacketIn and
# EventDPPortAdd. So packet-in event can happend before
# port add event. In that case key error can happend.
# LOG.debug('lldp_received: KeyError %s', e)
pass
dst = self._get_port(dst_dpid, dst_port_no)
if not dst:
return
old_peer = self.links.get_peer(src)
# LOG.debug("Packet-In")
# LOG.debug(" src=%s", src)
# LOG.debug(" dst=%s", dst)
# LOG.debug(" old_peer=%s", old_peer)
#print 'src,dst,old_peer: ',src,dst,old_peer
if old_peer and old_peer != dst:
old_link = Link(src, old_peer)
#print 333333
self.send_event_to_observers(event.EventLinkDelete(old_link))
link = Link(src, dst)
if link not in self.links:
self.send_event_to_observers(event.EventLinkAdd(link))
if not self.links.update_link(src, dst):
# reverse link is not detected yet.
# So schedule the check early because it's very likely it's up
self.ports.move_front(dst)
self.lldp_event.set()
if self.explicit_drop:
self._drop_packet(msg)
