Esempio n. 1
0
    def switch_handler(self, address, fd, events):
        if events & io_loop.READ:
            data = self.sock_sw.recv(1024)
            if data == '':
                print "switch disconnected"
                io_loop.remove_handler(self.fd_sw)
                print "closing connection to controller"
                self.sock_con.close()
                io_loop.remove_handler(self.fd_con)
            else:
                rmsg = of.ofp_header(data[0:8])

                if rmsg.type == 6:
                    print "OFPT_FEATURES_REPLY"                                                  #Actually,we just need to change here.
                    header = of.ofp_header(data[0:8]) 
                    print "ofp_features_reply.xid ", header.xid
                    msg = of.ofp_features_reply(data[8:32])     #all sw type should make the convertion. Because our protocol need to use in all nets.
                    msg_port = data[32:]
                    msg = header/msg/msg_port                     
                    self.dpid=msg.datapath_id       #record the dpid
                    data = convert.of2ofc(msg, self.buffer, self.dpid)   
                    
                elif rmsg.type == 10:
                    pkt_in_msg = of.ofp_packet_in(data[8:18])
                    pkt_parsed = of.Ether(data[18:])
                    self.counter+=1
                    #[port + id+ dpid] --> [buffer_id + pkt_in_msg]
                    if isinstance(pkt_parsed.payload, of.IP) or isinstance(pkt_parsed.payload.payload, of.IP):
                        self.buffer[(pkt_in_msg.in_port, self.counter, self.dpid)] = [pkt_in_msg.buffer_id, rmsg/pkt_in_msg/pkt_parsed] # bind buffer id with in port 
                    rmsg.xid = self.counter                 # use the counter to check the buffer
                    data = rmsg/pkt_in_msg/pkt_parsed

                elif rmsg.type ==11:
                    match = ofc.ofp_match(data[12:48])                  #data[8:12]is wildcards
                    for flow in  self.flow_cache:
                        if match == ofc.ofp_match(str(flow[1])[12:48]):
                            self.flow_cache.remove(flow)                #delete the flow
                elif rmsg.type == 17:
                    print "stats_reply" ,len(data)
                    body = data[8:]
                    reply_header = of.ofp_stats_reply(body[:4])
                    if reply_header.type == 1 and len(data)>91:
                        reply_body_match = ofc.ofp_match(body[12:48])
                        reply_body_data2 = ofc.ofp_flow_stats_data(body[48:92])
                        if reply_body_data2.byte_count == 0 and reply_body_data2.packet_count == 0:  #it is a junck flow,delete it!
                            for flow in  self.flow_cache: 
                                if reply_body_match == ofc.ofp_match(str(flow[1])[12:48]):
                                    self.flow_cache.remove(flow)    
                io_loop.update_handler(self.fd_con, io_loop.WRITE)
                self.queue_con.put(str(data))
    
        if events & io_loop.WRITE:
            try:
                next_msg = self.queue_sw.get_nowait()
            except Queue.Empty:
                #print "%s queue empty" % str(address)
                io_loop.update_handler(self.fd_sw, io_loop.READ)
            else:
                #print 'sending "%s" to %s' % (of.ofp_type[of.ofp_header(next_msg).type], self.sock_sw.getpeername())
                self.sock_sw.send(next_msg)
Esempio n. 2
0
18   okay    "OFPT_BARRIER_REQUEST",
19   okay    "OFPT_BARRIER_REPLY",
20   okay    "OFPT_QUEUE_GET_CONFIG_REQUEST",
21   okay    "OFPT_QUEUE_GET_CONFIG_REPLY"
24   oaky    "OFPT_CFEATURES_REPLY"
0xfe oaky    "OFPT_CPORT_STATUS" 
0xff okay    "OFPT_CFLOW_MO
"""
    
if __name__ == '__main__':
    import convert
    import libopenflow as of 
    #a = ofp_cfeatures_reply()
    #b = ofp_phy_cport()
    #c = ofp_phy_cport()
    #d=ofp_header(type =24,length = 32+78*2)/ofp_cfeatures_reply(n_cports=2)/ofp_phy_cport()/sup_wave_port_bandwidth(num_lmda=4)/ofp_phy_cport()/sup_wave_port_bandwidth(num_lmda=5)

    #d.show()
    #a.n_cports=2
    #a.OFPC_TABLE_STATS=100
    #a.OFPST_T_OTN = 1
    #a.SUPP_SW_GRAN = 129
    #print a.SUPP_SW_GRAN
    buffer = {}
    dpid = 8

    e = of.ofp_header(type =6)/of.ofp_features_reply(datapath_id=1)/of.ofp_phy_port(port_no=1)/of.ofp_phy_port(port_no=2)\
                              /of.ofp_phy_port(port_no=3)/of.ofp_phy_port(port_no=4)/of.ofp_phy_port(port_no=5)
    f = convert.of2ofc(e, buffer, dpid)
    f.show()
    p = str(f)
Esempio n. 3
0
18   okay    "OFPT_BARRIER_REQUEST",
19   okay    "OFPT_BARRIER_REPLY",
20   okay    "OFPT_QUEUE_GET_CONFIG_REQUEST",
21   okay    "OFPT_QUEUE_GET_CONFIG_REPLY"
24   oaky    "OFPT_CFEATURES_REPLY"
0xfe oaky    "OFPT_CPORT_STATUS" 
0xff okay    "OFPT_CFLOW_MO
"""
    
if __name__ == '__main__':
    import convert
    import libopenflow as of 
    #a = ofp_cfeatures_reply()
    #b = ofp_phy_cport()
    #c = ofp_phy_cport()
    #d=ofp_header(type =24,length = 32+78*2)/ofp_cfeatures_reply(n_cports=2)/ofp_phy_cport()/sup_wave_port_bandwidth(num_lmda=4)/ofp_phy_cport()/sup_wave_port_bandwidth(num_lmda=5)

    #d.show()
    #a.n_cports=2
    #a.OFPC_TABLE_STATS=100
    #a.OFPST_T_OTN = 1
    #a.SUPP_SW_GRAN = 129
    #print a.SUPP_SW_GRAN
    buffer = {}
    dpid = 8

    e = of.ofp_header(type =6)/of.ofp_features_reply(datapath_id=1)/of.ofp_phy_port(port_no=1)/of.ofp_phy_port(port_no=2)\
                              /of.ofp_phy_port(port_no=3)/of.ofp_phy_port(port_no=4)/of.ofp_phy_port(port_no=5)
    f = convert.of2ofc(e, buffer, dpid)
    f.show()
    p = str(f)
Esempio n. 4
0
    def switch_handler(self, address, fd, events):
        if events & io_loop.READ:
            data = self.sock_sw.recv(1024)
            if data == '':
                print "switch disconnected"
                io_loop.remove_handler(self.fd_sw)
                print "closing connection to controller"
                self.sock_con.close()
                io_loop.remove_handler(self.fd_con)
            else:
                rmsg = of.ofp_header(data[0:8])

                if rmsg.type == 6:
                    print "OFPT_FEATURES_REPLY"  #Actually,we just need to change here.
                    header = of.ofp_header(data[0:8])
                    print "ofp_features_reply.xid ", header.xid
                    msg = of.ofp_features_reply(
                        data[8:32]
                    )  #all sw type should make the convertion. Because our protocol need to use in all nets.
                    msg_port = data[32:]
                    msg = header / msg / msg_port
                    self.dpid = msg.datapath_id  #record the dpid
                    data = convert.of2ofc(msg, self.buffer, self.dpid)

                elif rmsg.type == 10:
                    pkt_in_msg = of.ofp_packet_in(data[8:18])
                    pkt_parsed = of.Ether(data[18:])
                    self.counter += 1
                    #[port + id+ dpid] --> [buffer_id + pkt_in_msg]
                    if isinstance(pkt_parsed.payload, of.IP) or isinstance(
                            pkt_parsed.payload.payload, of.IP):
                        self.buffer[(pkt_in_msg.in_port, self.counter,
                                     self.dpid)] = [
                                         pkt_in_msg.buffer_id,
                                         rmsg / pkt_in_msg / pkt_parsed
                                     ]  # bind buffer id with in port
                    rmsg.xid = self.counter  # use the counter to check the buffer
                    data = rmsg / pkt_in_msg / pkt_parsed

                elif rmsg.type == 11:
                    match = ofc.ofp_match(data[12:48])  #data[8:12]is wildcards
                    for flow in self.flow_cache:
                        if match == ofc.ofp_match(str(flow[1])[12:48]):
                            self.flow_cache.remove(flow)  #delete the flow
                elif rmsg.type == 17:
                    print "stats_reply", len(data)
                    body = data[8:]
                    reply_header = of.ofp_stats_reply(body[:4])
                    if reply_header.type == 1 and len(data) > 91:
                        reply_body_match = ofc.ofp_match(body[12:48])
                        reply_body_data2 = ofc.ofp_flow_stats_data(body[48:92])
                        if reply_body_data2.byte_count == 0 and reply_body_data2.packet_count == 0:  #it is a junck flow,delete it!
                            for flow in self.flow_cache:
                                if reply_body_match == ofc.ofp_match(
                                        str(flow[1])[12:48]):
                                    self.flow_cache.remove(flow)
                io_loop.update_handler(self.fd_con, io_loop.WRITE)
                self.queue_con.put(str(data))

        if events & io_loop.WRITE:
            try:
                next_msg = self.queue_sw.get_nowait()
            except Queue.Empty:
                #print "%s queue empty" % str(address)
                io_loop.update_handler(self.fd_sw, io_loop.READ)
            else:
                #print 'sending "%s" to %s' % (of.ofp_type[of.ofp_header(next_msg).type], self.sock_sw.getpeername())
                self.sock_sw.send(next_msg)