def arp_reply_handler(pkt):
pkt_in_msg = pkt.payload
pkt_parsed = pkt_in_msg.payload
if pkt_parsed.payload.psrc not in ARP_TABLE:
arp_add(pkt_parsed.payload.psrc,
pkt_parsed.payload.hwsrc) #add arp record
if pkt_parsed.payload.pdst in ARP_TABLE:
ETHER = copy.deepcopy(pkt_parsed)
ETHER.dst = pkt_parsed.payload.hwsrc
ETHER.src = pkt_parsed.payload.hwdst
ETHER.payload.op = 2 #reply
ETHER.payload.hwdst = pkt_parsed.payload.hwsrc
ETHER.payload.hwsrc = ARP_TABLE[pkt_parsed.payload.pdst]
ETHER.payload.psrc = pkt_parsed.payload.pdst
ETHER.payload.pdst = pkt_parsed.payload.psrc
pkt_out = of.ofp_header() / of.ofp_pktout_header(
) / of.ofp_action_output() / ETHER
pkt_out.payload.payload.port = pkt_in_msg.in_port
pkt_out.payload.buffer_id = pkt_in_msg.buffer_id
pkt_out.payload.in_port = pkt_in_msg.in_port
pkt_out.payload.actions_len = 8
pkt_out.length = len(pkt_out)
return pkt_out
else:
pkt_out = of.ofp_header() / of.ofp_pktout_header(
) / of.ofp_action_output()
pkt_out.payload.payload.port = 0xfffb
pkt_out.payload.buffer_id = pkt_in_msg.buffer_id
pkt_out.payload.in_port = pkt_in_msg.in_port
pkt_out.payload.actions_len = 8
pkt_out.length = len(pkt_out)
return pkt_out
def client_handler(address, fd, events):
sock = fd_map[fd]
if events & io_loop.READ:
data = sock.recv(1024)
if data == '':
print ">>>Connection dropped"
io_loop.remove_handler(fd)
if len(data)<8:
print ">>>Length of packet is too short"
else:
if len(data)>=8:
rmsg = of.ofp_header(data[:8])
#rmsg.show()
body = data[8:]
if rmsg.type == 0:
msg = handler[0] (data)
message_queue_map[sock].put(str(msg))
message_queue_map[sock].put(str(of.ofp_header(type = 5)))
elif rmsg.type == 6:
handler[6] (data,fd)
else:
msg = handler[rmsg.type] (data,fd)
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
if events & io_loop.WRITE:
try:
next_msg = message_queue_map[sock].get_nowait()
except Queue.Empty:
#print "%s queue empty" % str(address)
io_loop.update_handler(fd, io_loop.READ)
else:
#print 'sending "%s" to %s' % (of.ofp_header(next_msg).type, address)
sock.send(next_msg)
def client_handler(address, fd, events):
sock = fd_map[fd]
if events & io_loop.READ:
data = sock.recv(1024)
if data == '':
print ">>>Connection dropped"
io_loop.remove_handler(fd)
if len(data) < 8:
print ">>>Length of packet is too short"
else:
if len(data) >= 8:
rmsg = of.ofp_header(data[:8])
#rmsg.show()
body = data[8:]
if rmsg.type == 0:
msg = handler[0](data)
message_queue_map[sock].put(str(msg))
message_queue_map[sock].put(str(of.ofp_header(type=5)))
elif rmsg.type == 6:
handler[6](data, fd)
else:
msg = handler[rmsg.type](data, fd)
message_queue_map[sock].put(str(msg))
io_loop.update_handler(fd, io_loop.WRITE)
if events & io_loop.WRITE:
try:
next_msg = message_queue_map[sock].get_nowait()
except Queue.Empty:
#print "%s queue empty" % str(address)
io_loop.update_handler(fd, io_loop.READ)
else:
#print 'sending "%s" to %s' % (of.ofp_header(next_msg).type, address)
sock.send(next_msg)
def arp_reply_handler(pkt): pkt_in_msg =pkt.payload pkt_parsed =pkt_in_msg.payload if pkt_parsed.payload.psrc not in ARP_TABLE: arp_add(pkt_parsed.payload.psrc,pkt_parsed.payload.hwsrc) #add arp record if pkt_parsed.payload.pdst in ARP_TABLE: ETHER = copy.deepcopy(pkt_parsed) ETHER.dst = pkt_parsed.payload.hwsrc ETHER.src = pkt_parsed.payload.hwdst ETHER.payload.op = 2#reply ETHER.payload.hwdst = pkt_parsed.payload.hwsrc ETHER.payload.hwsrc = ARP_TABLE[pkt_parsed.payload.pdst] ETHER.payload.psrc = pkt_parsed.payload.pdst ETHER.payload.pdst = pkt_parsed.payload.psrc pkt_out = of.ofp_header()/of.ofp_pktout_header()/of.ofp_action_output()/ETHER pkt_out.payload.payload.port = pkt_in_msg.in_port pkt_out.payload.buffer_id = pkt_in_msg.buffer_id pkt_out.payload.in_port = pkt_in_msg.in_port pkt_out.payload.actions_len = 8 pkt_out.length = len(pkt_out) return pkt_out else: pkt_out = of.ofp_header()/of.ofp_pktout_header()/of.ofp_action_output() pkt_out.payload.payload.port = 0xfffb pkt_out.payload.buffer_id = pkt_in_msg.buffer_id pkt_out.payload.in_port = pkt_in_msg.in_port pkt_out.payload.actions_len = 8 pkt_out.length = len(pkt_out) return pkt_out
def switch(pkt, dpid, *args):
rmsg = pkt
pkt_in_msg = pkt.payload
pkt_parsed = pkt.payload.payload
mactoport_add(src_mac=pkt_parsed.src, in_port=pkt_in_msg.in_port)
if pkt_parsed.dst == "ff:ff:ff:ff:ff:ff":
if pkt_parsed.payload.type == 0x0806: #all ARP will be ARP REQUEST first.
return arp_server.arp_reply_handler(pkt)
else:
pkt_out = of.ofp_header() / of.ofp_pktout_header(
) / of.ofp_action_output()
pkt_out.payload.payload.port = 0xfffb
pkt_out.payload.buffer_id = pkt_in_msg.buffer_id
pkt_out.payload.in_port = pkt_in_msg.in_port
pkt_out.payload.actions_len = 8
pkt_out.length = len(pkt_out)
return pkt_out
else:
if pkt_parsed.dst in mactoport:
out_port = mactoport[pkt_parsed.dst]
else:
out_port = 0xfffb
flow_mod = of.create_flow(pkt, out_port)
flow_database.flow_add(flow_mod, dpid)
return flow_mod
def switch(pkt,dpid,*args): rmsg = pkt pkt_in_msg = pkt.payload pkt_parsed = pkt.payload.payload mactoport_add(src_mac = pkt_parsed.src, in_port = pkt_in_msg.in_port) if pkt_parsed.dst == "ff:ff:ff:ff:ff:ff": if pkt_parsed.payload.type == 0x0806: #all ARP will be ARP REQUEST first. return arp_server.arp_reply_handler(pkt) else: pkt_out = of.ofp_header()/of.ofp_pktout_header()/of.ofp_action_output() pkt_out.payload.payload.port = 0xfffb pkt_out.payload.buffer_id = pkt_in_msg.buffer_id pkt_out.payload.in_port = pkt_in_msg.in_port pkt_out.payload.actions_len = 8 pkt_out.length = len(pkt_out) return pkt_out else: if pkt_parsed.dst in mactoport: out_port = mactoport[pkt_parsed.dst] else: out_port = 0xfffb flow_mod = of.create_flow(pkt, out_port) flow_database.flow_add(flow_mod,dpid) return flow_mod
def recv_handler(self, fd_map, message_queue_map):
for fd in fd_map.keys():
self.fd_lock.acquire()
sock = fd_map[fd]
self.fd_lock.release()
self.sock_lock.acquire()
print "sock_lock by recv_message"
data = sock.recv(1024)
self.sock_lock.release()
print "sock_unlock by recv_message"
if data == '':
print ">>>Connection dropped"
self.fd_lock.acquire()
del fd_map[fd]
#sock.close()
self.fd_lock.release()
self.queue_lock.acquire()
del message_queue_map[sock]
self.queue_lock.release()
if len(data) < 8:
print ">>>Length of packet is too short"
else:
if len(data) >= 8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
if rmsg.type == 0:
msg = self.handler[0](data)
self.queue_lock.acquire()
print "hello queue_lock by recv_message"
message_queue_map[sock].put(str(msg))
message_queue_map[sock].put(str(of.ofp_header(type=5)))
self.queue_lock.release()
print "hello queue_unlock by recv_message"
elif rmsg.type == 6:
self.handler[6](data, fd)
else:
msg = self.handler[rmsg.type](data, fd)
queue_lock.acquire()
print "other queue_lock by recv_message"
message_queue_map[sock].put(str(msg))
queue_lock.release()
print "other queue_unlock by recv_message"
def recv_handler(self, fd_map, message_queue_map):
for fd in fd_map.keys():
self.fd_lock.acquire()
sock = fd_map[fd]
self.fd_lock.release()
self.sock_lock.acquire()
print "sock_lock by recv_message"
data = sock.recv(1024)
self.sock_lock.release()
print "sock_unlock by recv_message"
if data == "":
print ">>>Connection dropped"
self.fd_lock.acquire()
del fd_map[fd]
# sock.close()
self.fd_lock.release()
self.queue_lock.acquire()
del message_queue_map[sock]
self.queue_lock.release()
if len(data) < 8:
print ">>>Length of packet is too short"
else:
if len(data) >= 8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
if rmsg.type == 0:
msg = self.handler[0](data)
self.queue_lock.acquire()
print "hello queue_lock by recv_message"
message_queue_map[sock].put(str(msg))
message_queue_map[sock].put(str(of.ofp_header(type=5)))
self.queue_lock.release()
print "hello queue_unlock by recv_message"
elif rmsg.type == 6:
self.handler[6](data, fd)
else:
msg = self.handler[rmsg.type](data, fd)
queue_lock.acquire()
print "other queue_lock by recv_message"
message_queue_map[sock].put(str(msg))
queue_lock.release()
print "other queue_unlock by recv_message"