def test_barrier_1(self):
results = []
sc, ss = self.sc, self.ss
serv = TestChannel(socket=ss)
serv.start()
sc.send(sc.recv(1024)) # echo back HELLO
serv.recv() # consume HELLO
cb1 = lambda *a: results.append(("cb1", a))
cb2 = lambda *a: results.append(("cb2", a))
echo = b.ofp_header(version=4,type=2,xid=1,length=8)
serv.send(echo, callback=cb1)
pkt = sc.recv(1024)
b1 = p.parse(pkt[:8])
assert b1.header.type == ofp4.OFPT_BARRIER_REQUEST
assert echo == pkt[8:], pkt[8:]
echo = b.ofp_header(version=4,type=2,xid=2,length=8)
serv.send(echo, callback=cb2)
pkt = sc.recv(1024)
b2 = p.parse(pkt[:8])
assert b2.header.type == ofp4.OFPT_BARRIER_REQUEST
assert echo == pkt[8:], pkt[8:]
echo = b.ofp_header(version=4,type=2,xid=3,length=8)
serv.send(echo, callback=cb1)
pkt = sc.recv(1024)
b3 = p.parse(pkt[:8])
assert b3.header.type == ofp4.OFPT_BARRIER_REQUEST
assert echo == pkt[8:], pkt[8:]
sc.send(b.ofp_header(version=4,
type=ofp4.OFPT_BARRIER_REPLY,
xid=b1.header.xid,
length=8))
sc.send(b.ofp_header(version=4,type=3,xid=1,length=8))
sc.send(b.ofp_header(version=4,
type=ofp4.OFPT_BARRIER_REPLY,
xid=b2.header.xid,
length=8))
sc.send(b.ofp_header(version=4,type=3,xid=2,length=8))
sc.send(b.ofp_header(version=4,
type=ofp4.OFPT_BARRIER_REPLY,
xid=b3.header.xid,
length=8))
sc.send(b.ofp_header(version=4,type=3,xid=3,length=8))
sc.close()
serv.loop()
assert [r[0] for r in results] == ["cb1", "cb2", "cb1"], [r[0] for r in results]
def controller(self, message, channel): import twink.ofp4.parse as ofp4p import twink.ofp4.build as ofp4b msg = ofp4p.parse(message) if msg.header.type==0: assert len(channel.ports) == 0 channel.close()
def handleOFMessage(self, data):
"""
Handles OpenFlow messages.
"""
# experimenter message -> ofx.
version = ord(data[0])
messageType = ord(data[1])
mlen = len(data)
# self.dprint ("version: %s type: %s len: %s"%(version, messageType, mlen))
exp_id = None
if messageType == 4:
exp_id, exp_type = struct.unpack("!II", data[8:16])
if exp_id == OFX_MESSAGE:
contents = data[16::]
self.handleOFXMessage(exp_id, exp_type, contents)
else:
ofMessage = ofparse.parse(data)
ofMessageType = ofMessage.__class__.__name__
# else, run it through all the registered interceptors.
if ofMessageType in self.OFInterceptors:
for fcn in self.OFInterceptors[ofMessageType]:
data = fcn(data)
return data
def switch_reactor(self, message, channel): import twink.ofp4.parse as ofp4p import twink.ofp4.build as ofp4b msg = ofp4p.parse(message) if msg.header.type==18 and msg.type==13: channel.send(ofp4b.ofp_multipart_reply(ofp4b.ofp_header(4, 19, None, msg.header.xid), 13, 0, ()))
def handle(self, message, channel):
msg = ofp4parse.parse(message)
if msg.header.type == ofp4.OFPT_HELLO:
self.ofctl("add-group", "group_id=1,type=all,"+",".join(["bucket=output:%d" % port.port_no for port in self.ports]))
self.add_flow("table=0,priority=1, actions=controller,goto_table:1")
self.add_flow("table=1,priority=3, dl_dst=01:00:00:00:00:00/01:00:00:00:00:00, actions=group:1")
self.add_flow("table=1,priority=1, actions=group:1")
self.init = True
def handleOFXMessage(self, data, datapathSendFcn):
"""
Handles OFX messages (experimenter messages with appropriate
type code).
"""
ofMessage = ofparse.parse(data)
ofxModuleId = ofMessage.exp_type
# if it goes to the OFX management module, send it there.
if ofxModuleId==OFX_MANAGEMENT_MODULE:
self.handleOFXManagementMessage(ofMessage.data, datapathSendFcn)
# else, send it to whatever module's function is registered to handle the id.
elif ofxModuleId in self.moduleHandlers:
self.moduleHandlers[ofxModuleId](ofMessage.data, datapathSendFcn)
def handle_async(self, message, channel):
if not self.init:
return
msg = ofp4parse.parse(message)
if msg.header.type == ofp4.OFPT_PACKET_IN:
print(msg)
in_port = [o for o in oxm.parse_list(msg.match.oxm_fields) if o.oxm_field==oxm.OXM_OF_IN_PORT][0].oxm_value
src_mac = ":".join(["%02x" % ord(a) for a in msg.data[6:12]])
channel.add_flow("table=0,priority=2,idle_timeout=300, dl_src=%s,in_port=%d, actions=goto_table:1" % (src_mac, in_port))
channel.add_flow("table=1,priority=2,idle_timeout=300, dl_dst=%s, actions=output:%d" % (src_mac, in_port))
channel.send(b.ofp_packet_out(None, msg.buffer_id, in_port, None, [], None))
print(self.ofctl("dump-flows"))
def handle(self, message, channel):
msg = ofp4parse.parse(message)
if msg.header.type == ofp4.OFPT_HELLO:
self.ofctl(
"add-group", "group_id=1,type=all," + ",".join(
["bucket=output:%d" % port.port_no
for port in self.ports]))
self.add_flow(
"table=0,priority=1, actions=controller,goto_table:1")
self.add_flow(
"table=1,priority=3, dl_dst=01:00:00:00:00:00/01:00:00:00:00:00, actions=group:1"
)
self.add_flow("table=1,priority=1, actions=group:1")
self.init = True
def switch_proc(message, channel):
msg = p.parse(message)
if msg.header.type == OFPT_FEATURES_REQUEST:
channel.send(b.ofp_switch_features(b.ofp_header(4, OFPT_FEATURES_REPLY, 0, msg.header.xid), 1, 2, 3, 0, 0xF))
elif msg.header.type == OFPT_GET_CONFIG_REQUEST:
channel.send(b.ofp_switch_config(b.ofp_header(4, OFPT_GET_CONFIG_REPLY, 0, msg.header.xid), 0, 0xffe5))
elif msg.header.type == OFPT_MULTIPART_REQUEST:
if msg.type == OFPMP_FLOW:
channel.send(b.ofp_multipart_reply(b.ofp_header(4, OFPT_MULTIPART_REPLY, 0, msg.header.xid),
msg.type, 0, [
b.ofp_flow_stats(None, 0, 10, 20, 30, 40, 50, 0, 1, 2, 3,
b.ofp_match(None, None, "".join([
oxm.build(None, oxm.OXM_OF_IN_PORT, None, None, 222),
oxm.build(None, oxm.OXM_OF_ETH_SRC, None, None, binascii.a2b_hex("00112233"))])),
[b.ofp_instruction_actions(OFPIT_APPLY_ACTIONS, None, [
b.ofp_action_output(None, None, 1111, OFPCML_MAX)]),
]),]))
def test_io(self):
def handle(msg, ch):
context["channel"] = ch
# blocking server
serv = twink.StreamServer(("localhost",0))
serv.channel_cls = TestChannel
serv_thread = twink.sched.spawn(serv.start)
context["stop"] = serv.stop
ch = None
socket = twink.sched.socket
s = socket.create_connection(serv.server_address[:2])
ch = type("Client", (twink.OpenflowChannel, twink.LoggingChannel), {"accept_versions":[4,]})()
ch.attach(s)
msg = ch.recv()
assert msg
version, oftype, l, xid = twink.parse_ofp_header(msg)
assert version==4
twink.sched.Event().wait(0.3)
mon = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
mon.connect("unknown-%x.monitor" % id(context["channel"]))
m = type("Client", (twink.OpenflowChannel, twink.LoggingChannel), {"accept_versions":[4,]})()
m.attach(mon)
assert p.parse(m.recv()).header.type == ofp4.OFPT_HELLO
msg = b.ofp_header(version=4, type=2, xid=2, length=8)
ch.send(msg)
assert m.recv() == msg
mon.close()
ch.send(b.ofp_header(version=4, type=2, xid=3, length=8))
assert m.recv() == b""
ch.close()
twink.sched.Event().wait(0.1) # wait for serv.loop reads the buffer
serv.stop()
serv_thread.join()
assert context["loop_error"] is None, context["loop_error"]
def test_add_flow(self):
converted = rule2ofp("in_port=1,actions=drop")[0]
flow = p.parse(converted)
assert flow.header.type == OFPT_FLOW_MOD
assert flow.match.oxm_fields
assert not flow.instructions
converted = rule2ofp("in_port=1,actions=drop", version=1)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 1
assert v1msg[1] == 14
converted = rule2ofp("in_port=1,actions=drop", version=2)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 2
assert v1msg[1] == 14
converted = rule2ofp("in_port=1,actions=drop", version=3)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 3
assert v1msg[1] == 14
def test_add_flow(self):
converted = rule2ofp("in_port=1,actions=drop")[0]
flow = p.parse(converted)
assert flow.header.type == OFPT_FLOW_MOD
assert flow.match.oxm_fields
assert not flow.instructions
converted = rule2ofp("in_port=1,actions=drop", version=1)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 1
assert v1msg[1] == 14
converted = rule2ofp("in_port=1,actions=drop", version=2)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 2
assert v1msg[1] == 14
converted = rule2ofp("in_port=1,actions=drop", version=3)[0]
v1msg = struct.unpack_from("!BBHI", converted)
assert v1msg[0] == 3
assert v1msg[1] == 14
def handle_async(self, message, channel):
if not self.init:
return
msg = ofp4parse.parse(message)
if msg.header.type == ofp4.OFPT_PACKET_IN:
print(msg)
in_port = [
o for o in oxm.parse_list(msg.match.oxm_fields)
if o.oxm_field == oxm.OXM_OF_IN_PORT
][0].oxm_value
src_mac = ":".join(["%02x" % ord(a) for a in msg.data[6:12]])
channel.add_flow(
"table=0,priority=2,idle_timeout=300, dl_src=%s,in_port=%d, actions=goto_table:1"
% (src_mac, in_port))
channel.add_flow(
"table=1,priority=2,idle_timeout=300, dl_dst=%s, actions=output:%d"
% (src_mac, in_port))
channel.send(
b.ofp_packet_out(None, msg.buffer_id, in_port, None, [], None))
print(self.ofctl("dump-flows"))
def switch_proc(message, ofchannel):
msg = p.parse(message)
# TODO: Acquire lock
if msg.header.type == OFPT_FEATURES_REQUEST:
channel.send(b.ofp_switch_features(b.ofp_header(4, OFPT_FEATURES_REPLY, 0, msg.header.xid), 1, 2, 3, 0, 0xF))
elif msg.header.type == OFPT_GET_CONFIG_REQUEST:
channel.send(b.ofp_switch_config(b.ofp_header(4, OFPT_GET_CONFIG_REPLY, 0, msg.header.xid), 0, 0xffe5))
elif msg.header.type == OFPT_ROLE_REQUEST:
channel.send(b.ofp_role_request(b.ofp_header(4, OFPT_ROLE_REPLY, 0, msg.header.xid), msg.role, msg.generation_id))
elif msg.header.type == OFPT_FLOW_MOD:
if msg.cookie not in flows:
flows[msg.cookie] = msg
else:
print "I already have this FlowMod: Cookie", \
msg.cookie, oxm.parse_list(flows[msg.cookie].match), (flows[msg.cookie].instructions)
elif msg.header.type == OFPT_MULTIPART_REQUEST:
if msg.type == OFPMP_FLOW:
channel.send(b.ofp_multipart_reply(b.ofp_header(4, OFPT_MULTIPART_REPLY, 0, msg.header.xid),
msg.type, 0, ["".join(b.ofp_flow_stats(None, f.table_id, 1, 2, f.priority,
f.idle_timeout, f.hard_timeout, f.flags, f.cookie, 0, 0,
f.match, f.instructions)
for f in flows.itervalues())]))
elif msg.type == OFPMP_PORT_DESC:
channel.send(b.ofp_multipart_reply(b.ofp_header(4, OFPT_MULTIPART_REPLY, 0, msg.header.xid),
msg.type, 0, ["".join(b.ofp_port(ofp.port_no, ofp.hw_addr, ofp.name, ofp.config, ofp.state,
ofp.curr, ofp.advertised, ofp.supported, ofp.peer, ofp.curr_speed, ofp.max_speed)
for ofp in of_ports.itervalues())]))
elif msg.type == OFPMP_DESC:
channel.send(b.ofp_multipart_reply(b.ofp_header(4, OFPT_MULTIPART_REPLY, 0, msg.header.xid),
msg.type, 0,
b.ofp_desc("UC Berkeley", "Intel Xeon", "BESS", "commit-6e343", None)))
elif msg.header.type == OFPT_PACKET_OUT:
index = msg.actions[0].port
print "Packet out OF Port %d, Len:%d" % (index, len(msg.data))
sock = of_ports[index].pkt_inout_socket
if sock is not None:
sent = sock.send(msg.data)
if sent != len(msg.data):
print "Incomplete Transmission Sent:%d, Len:%d" % (sent, len(msg.data))
else:
print "Packet out OF Port %d, Len:%d. Failed - Null socket" % (index, len(msg.data))
elif msg.header.type == OFPT_HELLO:
pass
elif msg.header.type == OFPT_SET_CONFIG:
pass
elif msg.header.type == OFPT_BARRIER_REQUEST:
pass
else:
print msg
assert 0
try:
temp = testFile.read(8)
if temp is None:
break
start = struct.unpack("d", temp)[0]
temp = testFile.read(4)
length = struct.unpack("i", temp)[0]
msg = testFile.read(length)
data.append((start, length, msg))
except:
traceback.print_exc()
break
for (start, length, msg) in data:
pkt = parse.parse(msg)
print "working start%s" % start
if pkt.__class__.__name__ == "ofp_packet_in":
ether_pkt = Ether(pkt.data)
if UDP in ether_pkt:
udp_sport = ether_pkt[UDP].sport
start_time = start
udp_start_time[udp_sport] = start_time
elif pkt.__class__.__name__ == "ofp_packet_out":
ether_pkt = Ether(pkt.data)
if UDP in ether_pkt:
stop_time = start
udp_sport = ether_pkt[UDP].sport
udp_stop_time.append(stop_time - udp_start_time[udp_sport])
