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)
def client_handler(address, fd, events):
sock = fd_map[fd]
#print sock, sock.getpeername(), sock.getsockname()
if events & io_loop.READ:
data = sock.recv(1024)
if data == '':
"""
According to stackoverflow(http://stackoverflow.com/questions/667640/how-to-tell-if-a-connection-is-dead-in-python)
When a socket is closed, the server will receive a EOF. In python, however, server will
receive a empty string(''). So, when a switch disconnected, the server will find out
at once. But, if you do not react on this incident, there will be always a ``ioloop.read``
event. And the loop will run forever, thus, the CPU useage will be pretty high.
"""
print "connection dropped"
io_loop.remove_handler(fd)
if len(data)<8:
print "not a openflow message"
else:
#print len(data)
#if the data length is 8, then only of header
#else, there are payload after the header
if len(data)>8:
rmsg = of.ofp_header(data[0:8])
body = data[8:]
else:
rmsg = of.ofp_header(data)
#rmsg.show()
if rmsg.type == 0:
print "OFPT_HELLO"
msg = of.ofp_header(type = 5)
io_loop.update_handler(fd, io_loop.WRITE)
message_queue_map[sock].put(data)
message_queue_map[sock].put(str(msg))
elif rmsg.type == 1:
print "OFPT_ERROR"
elif rmsg.type == 5:
print "OFPT_FEATURES_REQUEST"
elif rmsg.type == 6:
print "OFPT_FEATURES_REPLY"
#print "rmsg.load:",len(body)/48
msg = of.ofp_features_reply(body[0:24])#length of reply msg
#msg.show()
port_info_raw = body[24:]
port_info = {}
print "port number:",len(port_info_raw)/48, "total length:", len(port_info_raw)
for i in range(len(port_info_raw)/48):
#print "port", i, ",len:", len(port_info_raw[0+i*48:48+i*48])
"""The port structure has a length of 48 bytes.
so when receiving port info, first split the list
into port structure length and then analysis
"""
port_info[i] = of.ofp_phy_port(port_info_raw[0+i*48:48+i*48])
#print port_info[i].port_name
#port_info[i].show()
#print port_info[i].OFPPC_PORT_DOWN
elif rmsg.type == 2:
print "OFPT_ECHO_REQUEST"
msg = of.ofp_header(type=3, xid=rmsg.xid)
#test for status request [which is good]
global exe_id
global ofp_match_obj
if exe_id>1:
#len = 8+4+44
stat_req = of.ofp_header(type=16,length=56)\
/of.ofp_stats_request(type=1)\
/of.ofp_flow_wildcards()\
/ofp_match_obj\
/of.ofp_flow_stats_request()
#stat_req.show()
message_queue_map[sock].put(str(msg))
if exe_id>1:
message_queue_map[sock].put(str(stat_req))
io_loop.update_handler(fd, io_loop.WRITE)
#end of test
#io_loop.update_handler(fd, io_loop.WRITE)
#message_queue_map[sock].put(str(msg))
elif rmsg.type == 3:
print "OFPT_ECHO_REPLY"
elif rmsg.type == 4:
print "OFPT_VENDOR"
elif rmsg.type == 6:
print "OFPT_FEATURES_REPLY"
elif rmsg.type == 7:
print "OFPT_GET_CONFIG_REQUEST"
elif rmsg.type == 8:
print "OFPT_GET_CONFIG_REPLY"
elif rmsg.type == 9:
print "OFPT_SET_CONFIG"
elif rmsg.type == 10:
#print "OFPT_PACKET_IN"
#rmsg.show()
pkt_in_msg = of.ofp_packet_in(body)
#pkt_in_msg.show()
raw = pkt_in_msg.load
pkt_parsed = of.Ether(raw)
#pkt_parsed.payload.show()
#print "to see if the payload of ether is IP"
#if isinstance(pkt_parsed.payload, of.IP):
#pkt_parsed.show()
if isinstance(pkt_parsed.payload, of.ARP):
#pkt_parsed.show()
#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.length = 24
#pkt_out.show()
io_loop.update_handler(fd, io_loop.WRITE)
message_queue_map[sock].put(str(pkt_out))
if isinstance(pkt_parsed.payload, of.IP):
if isinstance(pkt_parsed.payload.payload, of.ICMP):
#print "from", pkt_parsed.src, "to", pkt_parsed.dst
"""
When receive a OPF_PACKET_IN message, you can caculate a path, and then
use OFP_FLOW_MOD message to install path. Also, you can find out the exact
port to send the message, then you can use the following code to send a
OFP_PACKET_OUT message and send the packet to destination.
"""
#pkt_parsed.show()
#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.length = 24
"""
io_loop.update_handler(fd, io_loop.WRITE)
message_queue_map[sock].put(str(pkt_out))
"""
#print pkt_parsed.payload.proto
#pkt_parsed.show()
#print "ICMP protocol"
#pkt_out.show()
#usually don't have to fill in ``wilecards`` area
global cookie
global exe_id
exe_id += 1
cookie += 1
flow_mod_msg = of.ofp_header(type=14,
length=80,
xid=exe_id)/\
of.ofp_flow_wildcards()\
/of.ofp_match(in_port=pkt_in_msg.in_port,
dl_src=pkt_parsed.src,
dl_dst=pkt_parsed.dst,
dl_type=pkt_parsed.type,
nw_tos=pkt_parsed.payload.tos,
nw_proto=pkt_parsed.payload.proto,
nw_src=pkt_parsed.payload.src,
nw_dst=pkt_parsed.payload.dst,
tp_src = pkt_parsed.payload.payload.type,
tp_dst = pkt_parsed.payload.payload.code)\
/of.ofp_flow_mod(cookie=cookie,
command=0,
idle_timeout=60,
buffer_id=pkt_in_msg.buffer_id,#icmp type 8: request, 0: reply
flags=1)\
/of.ofp_action_output(type=0,
port=0xfffb,
len=8)
#flow_mod_msg.show()
global ofp_match_obj
ofp_match_obj = of.ofp_match(in_port=pkt_in_msg.in_port,
dl_src=pkt_parsed.src,
dl_dst=pkt_parsed.dst,
dl_type=pkt_parsed.type,
nw_tos=pkt_parsed.payload.tos,
nw_proto=pkt_parsed.payload.proto,
nw_src=pkt_parsed.payload.src,
nw_dst=pkt_parsed.payload.dst,
tp_src = pkt_parsed.payload.payload.type,
tp_dst = pkt_parsed.payload.payload.code)
exe_id += 1
"""
print "--------------------------------------------------------------------------------------"
print "len of flow_mod_msg :", len(str(flow_mod_msg))
print "len of of_header() :", len(str(of.ofp_header()))
print "len of ofp_flow_wildcards():", len(str(of.ofp_flow_wildcards()))
print "len of ofp_match() :", len(str(of.ofp_match()))
print "len of ofp_flow_mod() :", len(str(of.ofp_flow_mod(command=0,idle_timeout=60,buffer_id=pkt_in_msg.buffer_id)))
print "len of ofp_action_output() :", len(str(of.ofp_action_output(type=0,port=0xfffb,len=8)))
print "--------------------------------------------------------------------------------------"
"""
io_loop.update_handler(fd, io_loop.WRITE)
#message_queue_map[sock].put(str(pkt_out))
message_queue_map[sock].put(str(flow_mod_msg))
message_queue_map[sock].put(str(of.ofp_header(type=18,xid=exe_id))) #send a barrier request msg.
elif rmsg.type == 11:
print "OFPT_FLOW_REMOVED"
elif rmsg.type == 12:
print "OFPT_PORT_STATUS"
elif rmsg.type == 13:
print "OFPT_PACKET_OUT"
elif rmsg.type == 14:
print "OFPT_FLOW_MOD"
elif rmsg.type == 15:
print "OFPT_PORT_MOD"
elif rmsg.type == 16:
print "OFPT_STATS_REQUEST"
elif rmsg.type == 17:
print "OFPT_STATS_REPLY"
# 1. parsing ofp_stats_reply
reply_header = of.ofp_stats_reply(body[:4])
# 2.parsing ofp_flow_stats msg
reply_body_data1 = of.ofp_flow_stats(body[4:8])
# match field in ofp_flow_stats
reply_body_wildcards = of.ofp_flow_wildcards(body[8:12])
reply_body_match = of.ofp_match(body[12:48])
# second part in ofp_flow_stats
reply_body_data2 = of.ofp_flow_stats_data(body[48:92])
# 3.parsing actions
# should first judge action type
i = 0
reply_body_action = []
#print len(body[92:])
while i<len(body[92:]):
if body[95+i:96+i]==0x08:
print "0x08"
i+=8
if body[95+i:96+i] == 0x08:
reply_body_action.append(of.ofp_action_output(body[92+i:100+i]))
#i+=8
# 4.show msg
msg = reply_header/reply_body_data1/reply_body_wildcards/reply_body_match/reply_body_data2
msg.show()
print reply_body_action
# no message body
elif rmsg.type == 18:
print "OFPT_BARRIER_REQUEST"
#no message body, the xid is the previous barrier request xid
elif rmsg.type == 19:
print "OFPT_BARRIER_REPLY: ", rmsg.xid, "Successful"
elif rmsg.type == 20:
print "OFPT_QUEUE_GET_CONFIG_REQUEST"
elif rmsg.type == 21:
print "OFPT_QUEUE_GET_CONFIG_REPLY"
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)
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)
def of2ofc(msg, buffer, dpid):
print "of->ofc converting"
if isinstance(msg, of.ofp_header):#it is a of packet.
if isinstance(msg.payload, of.ofp_packet_in):
# Save the buffer_id from pkt_in message. As 1. of.pkt_out message needs buffer_id
# 2. the in_port is only one kind of pkt, this method seems okay in linear or ring topo
#only need the ofp_header()/ofp_packet_in() part of the msg
print "packet in from port", msg.payload.in_port
buffer[msg.payload.in_port] = msg.payload.buffer_id
if isinstance(msg.payload, of.ofp_flow_mod):
#basic structure: of.ofp_header()/of.ofp_flow_wildcards()/of.ofp_match()/of.ofp_flow_mod()/other_ofp_actions()
#select info from match (VLAN) and actions (just copy)
pass
if isinstance(msg.payload, of.ofp_features_reply):
print"it is a ofp_features_reply packet"
#basic structure:0fc.ofp_header()/ofc.ofp_cfeatures_reply()/ofc.ofp_phy_cport()/sup_wave_port_bandwidth()[n]
pkt_parsed = msg.payload #feature_reply
port_info = msg.payload.payload
port_raw=str(port_info)
port_num = len(port_raw)/48
phy_port = {}
phy_cport = {}
MyPort = {}
sw = setting.creat_sw(pkt_parsed.datapath_id)
cfeatures_reply = ofc.ofp_cfeatures_reply(datapath_id = pkt_parsed.datapath_id,
n_buffers = pkt_parsed.n_buffers,
n_tables = pkt_parsed.n_tables,
n_cports = port_num,
#features
OFPC_OTN_SWITCH = sw.type_otn, #1<<31 if it is a otn switch
OFPC_WAVE_SWITCH = sw.type_wave, #1<<30
OFPC_IP_SWITCH = sw.type_ip, #1<<29
OFPC_ARP_MATCH_IP = pkt_parsed.OFPC_ARP_MATCH_IP,
OFPC_QUEUE_STATS = pkt_parsed.OFPC_QUEUE_STATS, #1<<6 Queue statistics
OFPC_IP_STREAM = pkt_parsed.OFPC_IP_STREAM, #1<<5 Can reassemble IP fragments
OFPC_RESERVED = pkt_parsed.OFPC_RESERVED, #1<<4 Reserved, must be zero
OFPC_STP = pkt_parsed.OFPC_STP, #1<<3 802.1d spanning tree
OFPC_PORT_STATS =pkt_parsed.OFPC_PORT_STATS, #1<<2 Port statistics
OFPC_TABLE_STATS = pkt_parsed.OFPC_TABLE_STATS, #1<<1 Table statistics
OFPC_FLOW_STATS = pkt_parsed.OFPC_FLOW_STATS, #1<<0 Flow statistics
actions = pkt_parsed.actions)
for i in xrange(port_num):
phy_port[i] = of.ofp_phy_port(port_raw[i*48:i*48+48])
MyPort[i] = setting.creat_port(pkt_parsed.datapath_id, phy_port[i].port_no)
phy_cport[i] = ofc.ofp_phy_cport(port_no = phy_port[i].port_no,
hw_addr = phy_port[i].hw_addr,
port_name = phy_port[i].port_name,
#config
not_defined = phy_port[i].not_defined,
OFPPC_NO_PACKET_IN = phy_port[i].OFPPC_NO_PACKET_IN,
OFPPC_NO_FWD = phy_port[i].OFPPC_NO_FWD,
OFPPC_NO_FLOOD = phy_port[i].OFPPC_NO_FLOOD,
OFPPC_NO_RECV_STP =phy_port[i].OFPPC_NO_RECV_STP,
OFPPC_NO_RECV = phy_port[i].OFPPC_NO_RECV,
OFPPC_NO_STP = phy_port[i].OFPPC_NO_STP,
OFPPC_PORT_DOWN =phy_port[i].OFPPC_PORT_DOWN,
#state
OFPPS_LINK_DOWN = 0,
curr = 0,
advertised = 0,
supported = 0,
peer = 0,
#expend for circuit switch ports.
OFPST_FIBER = MyPort[i].OFPST_FIBER, # 1<<15 can switch circuits based on SM/MM fiber
OFPST_WAVE = MyPort[i].OFPST_WAVE, # 1<<14 can switch circuits based on ITU-T lambdas
OFPST_T_OTN = MyPort[i].OFPST_T_OTN, # 1<<13 can switch circuits based on OTN standard
OFPST_T_SDH = MyPort[i].OFPST_T_SDH, # 1<<12 can switch circuits based on SDH standard
OFPST_T_SONET = MyPort[i].OFPST_T_SONET, # 1<<11 can switch circuits based on SONET standard
#NOT_DEFINED = 0, # Not used
OFPST_ETH = MyPort[i].OFPST_ETH, # 1<<4 can switch packets based on ETH headers
OFPST_VLAN = MyPort[i].OFPST_VLAN, # 1<<3 can switch packets based on VLAN tags
OFPST_MPLS = MyPort[i].OFPST_MPLS, # 1<<2 can switch packets based on MPLS labels
OFPST_IP = MyPort[i].OFPST_IP, # 1<<1 can switch packets based on IP headers
OFPST_L4 = MyPort[i].OFPST_L4, # 1<<0 can switch packets based on TCP/UDP headers
SUPP_SW_GRAN = MyPort[i].SUPP_SW_GRAN, #use for defined something ,waiting a second.
sup_sdh_port_bandwidth = MyPort[i].sup_sdh_port_bandwidth,
sup_otn_port_bandwidth = MyPort[i].sup_otn_port_bandwidth,
peer_port_no = MyPort[i].peer_port_no,
peer_datapath_id = MyPort[i].peer_datapath_id)\
/ofc.sup_wave_port_bandwidth(center_freq_lmda = MyPort[i].center_freq_lmda,
num_lmda = MyPort[i].num_lmda,
freq_space_lmda = MyPort[i].freq_space_lmda
)
cfeatures_reply =cfeatures_reply/phy_cport[i]
cfeatures_reply = ofc.ofp_header(type = 24, length =port_num*74+32,)/cfeatures_reply
return cfeatures_reply
