def trim_connections(self):
for k, v in self.peers.iteritems():
# Trim TinCan link if the peer is offline
if "fpr" in v and v["status"] == "offline":
if v["last_time"] > CONFIG["wait_time"] * 2:
il.do_send_msg(self.sock, "send_msg", 1, k,
"destroy" + self.ipop_state["_uid"])
il.do_trim_link(self.sock, k)
# Trim TinCan link if the On Demand Inactive Timeout occurs
if CONFIG["on-demand_connection"] and v["status"] == "online":
if v["last_active"] + CONFIG["on-demand_inactive_timeout"]\
< time.time():
logging.debug("Inactive, trimming node:{0}".format(k))
il.do_send_msg(self.sock, 1, "send_msg", k,
"destroy" + self.ipop_state["_uid"])
il.do_trim_link(self.sock, k)
def serve(self):
# select.select returns a triple of lists of objects that are
# ready: subsets of the first three arguments. When the time-out,
# given as the last argument, is reached without a file descriptor
# becoming ready, three empty lists are returned.
socks, _, _ = select.select(self.sock_list, [], [], CONFIG["wait_time"])
for sock in socks:
if sock == self.sock or sock == self.sock_svr:
#---------------------------------------------------------------
#| offset(byte) | |
#---------------------------------------------------------------
#| 0 | ipop version |
#| 1 | message type |
#| 2 | Payload (JSON formatted control message) |
#---------------------------------------------------------------
data, addr = sock.recvfrom(CONFIG["buf_size"])
if data[0] != il.ipop_ver:
logging.debug("ipop version mismatch: tincan:{0} controller"
":{1}" "".format(data[0].encode("hex"), \
ipop_ver.encode("hex")))
sys.exit()
if data[1] == il.tincan_control:
msg = json.loads(data[2:])
logging.debug("recv %s %s" % (addr, data[2:]))
msg_type = msg.get("type", None)
if msg_type == "echo_request":
make_remote_call(self.sock_svr, m_type=tincan_control,\
dest_addr=addr[0], dest_port=addr[1], payload=None,\
type="echo_reply") # Reply to the echo_request
if msg_type == "local_state":
self.ipop_state = msg
elif msg_type == "peer_state":
if msg["status"] == "offline" or "stats" not in msg:
self.peers[msg["uid"]] = msg
self.trigger_conn_request(msg)
continue
stats = msg["stats"]
total_byte = 0
global REMOTE_UID
REMOTE_UID = msg["uid"]
for stat in stats:
total_byte += stat["sent_total_bytes"]
total_byte += stat["recv_total_bytes"]
msg["total_byte"]=total_byte
logging.debug("?? {0} {1} {2}".format(stats[0]["best_conn"], stats[0]["local_type"] , stats[0]["rem_type"]))
#if stats[0]["best_conn"] and stats[0]["local_type"] == "local" and stats[0]["rem_type"] == "local":
# Amazon AWS instance does not find itself as "local"
if stats[0]["best_conn"]:
ryu_msg = {}
ryu_msg["type"] = "tincan_notify"
ryu_msg["local_addr"] = stats[0]["local_addr"].split(":")[0]
ryu_msg["rem_addr"] = stats[0]["rem_addr"].split(":")[0]
# sock.sendto(json.dumps(ryu_msg),("::1", 30001))
global LOCAL_HOST_IPv4
global REMOTE_HOST_IPv4
LOCAL_HOST_IPv4 = stats[0]["local_addr"].split(":")[0]
REMOTE_HOST_IPv4 = stats[0]["rem_addr"].split(":")[0]
logging.debug("REMOTE_HOST_IPv4:{0}".format(REMOTE_HOST_IPv4))
logging.debug("self.peers:{0}".format(self.peers))
if not msg["uid"] in self.peers:
msg["last_active"]=time.time()
elif not "total_byte" in self.peers[msg["uid"]]:
msg["last_active"]=time.time()
else:
if msg["total_byte"] > \
self.peers[msg["uid"]]["total_byte"]:
msg["last_active"]=time.time()
else:
msg["last_active"]=\
self.peers[msg["uid"]]["last_active"]
self.peers[msg["uid"]] = msg
# we ignore connection status notification for now
elif msg_type == "con_stat": pass
elif msg_type == "con_req":
if CONFIG["on-demand_connection"]:
self.idle_peers[msg["uid"]]=msg
else:
if self.check_collision(msg_type,msg["uid"]):
continue
fpr_len = len(self.ipop_state["_fpr"])
fpr = msg["data"][:fpr_len]
cas = msg["data"][fpr_len + 1:]
ip4 = self.uid_ip_table[msg["uid"]]
self.create_connection(msg["uid"], fpr, 1,
CONFIG["sec"], cas, ip4)
elif msg_type == "con_resp":
if self.check_collision(msg_type, msg["uid"]): continue
fpr_len = len(self.ipop_state["_fpr"])
fpr = msg["data"][:fpr_len]
cas = msg["data"][fpr_len + 1:]
ip4 = self.uid_ip_table[msg["uid"]]
self.create_connection(msg["uid"], fpr, 1,
CONFIG["sec"], cas, ip4)
# send message is used as "request for start mutual
# connection"
elif msg_type == "send_msg":
if CONFIG["on-demand_connection"]:
if msg["data"].startswith("destroy"):
il.do_trim_link(self.sock, msg["uid"])
else:
self.ondemand_create_connection(msg["uid"],
False)
elif msg_type == "packet_notify":
if msg["nw_proto"] == 6:
if msg["ack"] != 0:
continue
if msg["src_port"] == 68:
continue #Ignore BOOTP
if msg["src_port"] == 5353:
continue #Ignore Multicast DNS
if msg["src_port"] == 30000:
continue #Ignore ICC packet
if msg["nw_proto"] == 17:
continue # Let's ignore UDP for the time being
#ryu_msg = {}
#ryu_msg["type"] = "packet_notify"
#ryu_msg["protocol"] = msg["data"].split(',')[0]
#msg["remote_ipop_ipv4"] = REMOTE_IPOP_IPv4
# TODO I'm just using the src_port to differentiate the
# stream. so if the src_port is the same I consider it
# as the same TCP/UDp stream. For correct implementation
# I have to use src_port dst_port src_ipv4 and dst_ipv4.
random.seed(msg["src_port"])
src_random_port = random.randint(49125, 65535)
dst_random_port = random.randint(49125, 65535)
msg_id = random.randint(1, 65535)
msg["msg_id"] = msg_id
msg["src_host_ipv4"] = REMOTE_HOST_IPv4
msg["local_host_ipv4"] = LOCAL_HOST_IPv4
msg["remote_host_ipv4"] = REMOTE_HOST_IPv4
msg["src_random_port"] = src_random_port
msg["dst_random_port"] = dst_random_port
#ryu_msg["src_mac"] = msg["src_mac"]
#ryu_msg["dst_mac"] = msg["data"].split(',')[2]
#ryu_msg["src_ipv4"] = msg["data"].split(',')[3]
#ryu_msg["dst_ipv4"] = msg["data"].split(',')[4]
#logging.debug("Try sending message to {0}".format(REMOTE_IPOP_IPv4))
#logging.debug("Try sending message to {0}".format("::1 / 30001"))
#msg["type"] = "packet_notify_remote"
logging.debug("sending message to retmoe and local --- {0}".format(msg))
msg["type"] = "packet_notify_remote"
self.icc_sendto_control(REMOTE_UID, json.dumps(msg))
#ret1 = self.cc_sock.sendto(json.dumps(msg), (REMOTE_IPOP_IPv4, 30002))
#ret1 = self.cc_sock.sendto(json.dumps(msg), (REMOTE_IPOP_IPv6, 30002))
#time.sleep(5)
#msg["type"] = "packet_notify_local"
msg["type"] = "packet_notify_local_inbound"
PENDING_MSG[msg_id] = msg
self.observable.send_msg("ocs", "control", msg)
#ret0 = self.sock.sendto(json.dumps(msg),("::1", 30001))
#logging.debug("Sent {0} {1} byte".format(ret0, ret1))
# If a packet that is destined to yet no p2p connection
# established node, the packet as a whole is forwarded to
# controller
#|-------------------------------------------------------------|
#| offset(byte) | |
#|-------------------------------------------------------------|
#| 0 | ipop version |
#| 1 | message type |
#| 2 | source uid |
#| 22 | destination uid |
#| 42 | Payload (Ethernet frame) |
#|-------------------------------------------------------------|
elif data[1] == il.tincan_packet:
# Ignore IPv6 packets for log readability. Most of them are
# Multicast DNS packets
if data[54:56] == "\x86\xdd":
logging.debug("Ignoring IPv6 packet")
continue
# Ignore IPv4 Multicast Packets
if data[42:45] == "\x01\x00\x5e":
logging.debug("Ignoring IPv4 multicast")
continue
logging.debug("IP packet forwarded \nversion:{0}\nmsg_type:"
"{1}\nsrc_uid:{2}\ndest_uid:{3}\nsrc_mac:{4}\ndst_mac:{"
"5}\neth_type:{6}".format(data[0].encode("hex"), \
data[1].encode("hex"), data[2:22].encode("hex"), \
data[22:42].encode("hex"), data[42:48].encode("hex"),\
data[48:54].encode("hex"), data[54:56].encode("hex")))
if not CONFIG["on-demand_connection"]:
continue
if len(data) < 16:
continue
self.create_connection_req(data[2:])
elif data[1] == "\x03":
logging.debug("ICC control")
#for i in range(0, len(data)):
# logging.debug("ICC control:{0} {1}".format(i, data[i]))
# TODO i don't know why but there is some trailing null characters
msglist = data[56:].split("\x00")
#print msglist
rawmsg = msglist[0]
#print rawmsg
msg = json.loads(rawmsg)
#print msg
if msg["type"] == "ack":
pending_msg = PENDING_MSG[msg["msg_id"]]
pending_msg["type"] = "packet_notify_local_outbound"
self.observable.send_msg("ocs", "control", pending_msg)
else :
self.observable.send_msg("ocs", "control", msg)
ack = {}
ack["msg_id"] = msg["msg_id"]
ack["type"] = "ack"
src_uid = il.uid_b2a(data[2:22])
self.icc_sendto_control(src_uid, json.dumps(ack))
elif data[1] == "\x04":
logging.debug("ICC packet")
else:
logging.error("Unknown type message")
logging.debug("{0}".format(data[0:].encode("hex")))
sys.exit()
else:
logging.error("Unknown type socket")
sys.exit()