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ryu-iot.py
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ryu-iot.py
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from traceback import print_tb
from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_0
from ryu.lib.mac import haddr_to_bin
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ether_types
from ryu.lib.packet import udp
from ryu.lib.packet import tcp
from ryu.lib.packet import icmp
class IotSlicing(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
def __init__(self, *args, **kwargs):
super(IotSlicing, self).__init__(*args, **kwargs)
# out_port = slice_to_port[dpid][mac_address]
self.mac_to_port = {
4: {"00:00:00:00:00:0b": 4, "00:00:00:00:00:0c": 3},
5: {"00:00:00:00:00:01": 3, "00:00:00:00:00:02": 4},
}
# out_port = slice_to_port[dpid][in_port]
self.slice_to_port = {
6: {1: 2, 2: 0},
# 6: {1: 2, 2: 1},
}
self.end_switches = [4, 5, 6]
self.slice_UDPport = 1883
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
# install the table-miss flow entry.
match = parser.OFPMatch()
actions = [
parser.OFPActionOutput(ofproto.OFPP_CONTROLLER)
]
self.add_flow(datapath, 0, match, actions)
def add_flow(self, datapath, priority, match, actions):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
# construct flow_mod message and send it.
mod = parser.OFPFlowMod(
datapath=datapath,
match=match,
cookie=0,
command=ofproto.OFPFC_ADD,
idle_timeout=20,
hard_timeout=120,
priority=priority,
flags=ofproto.OFPFF_SEND_FLOW_REM,
actions=actions,
)
datapath.send_msg(mod)
def _send_package(self, msg, datapath, in_port, actions):
data = None
ofproto = datapath.ofproto
if msg.buffer_id == ofproto.OFP_NO_BUFFER:
data = msg.data
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath,
buffer_id=msg.buffer_id,
in_port=in_port,
actions=actions,
data=data,
)
# self.logger.info("send_msg %s", out)
datapath.send_msg(out)
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def _packet_in_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
in_port = msg.in_port
dpid = datapath.id
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
dst = eth.dst
src = eth.src
if eth.ethertype == ether_types.ETH_TYPE_LLDP:
# ignore lldp packet
# self.logger.info("LLDP packet discarded.")
return
if dst[:2] == '33':
return
print(dst, dpid, in_port)
self.logger.info(
"INFO packet arrived in s%s (in_port=%s), dst=%s, src=%s", dpid, in_port, dst, src)
if dpid in self.end_switches:
# print(pkt.get_protocol(tcp.tcp),pkt.get_protocol(tcp.tcp).dst_port,pkt.get_protocol(tcp.tcp).src_port)
# print(pkt.get_protocol(udp.udp), pkt.get_protocol(udp.udp).dst_port, pkt.get_protocol(udp.udp).src_port)
# print(pkt.get_protocol(udp.udp))
if (
pkt.get_protocol(udp.udp)
and pkt.get_protocol(udp.udp).dst_port == self.slice_UDPport
# True
):
in_slice = dpid in self.slice_to_port
in_in_port = in_slice and (in_port in self.slice_to_port[dpid])
in_mac = dpid in self.mac_to_port
in_dst = in_mac and (dst in self.mac_to_port[dpid])
if not in_in_port and not in_dst:
out_port = 1
self.logger.info(
"INFO sending packet from s%s (out_port=%s), dst=%s, src=%s w/ mac-to-port rule",
dpid,
out_port,
dst,
src
)
actions = [
datapath.ofproto_parser.OFPActionOutput(out_port)]
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port,
dl_dst=dst,
dl_src=src,
dl_type=ether_types.ETH_TYPE_IP,
nw_proto=0x11
)
self.add_flow(datapath, 1, match, actions)
self._send_package(msg, datapath, in_port, actions)
elif not in_in_port and in_dst:
out_port = self.mac_to_port[dpid][dst]
self.logger.info(
"INFO sending packet from s%s (out_port=%s), dst=%s, src=%s w/ mac-to-port rule",
dpid,
out_port,
dst,
src
)
actions = [
datapath.ofproto_parser.OFPActionOutput(out_port)]
# match = datapath.ofproto_parser.OFPMatch(in_port=in_port)
# self.logger.info("INFO sending packet from s%s (out_port=%s)", dpid, out_port)
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port,
dl_dst=dst,
dl_src=src,
dl_type=ether_types.ETH_TYPE_IP,
nw_proto=0x11
)
self.add_flow(datapath, 1, match, actions)
self._send_package(msg, datapath, in_port, actions)
elif in_in_port and not in_dst:
out_port = self.slice_to_port[dpid][in_port]
# Block left side of IoT from right
if out_port == 0:
return
self.logger.info(
"INFO sending packet from s%s (out_port=%s), dst=%s, src=%s w/ slice-to-port rule",
dpid,
out_port,
dst,
src
)
actions = [
datapath.ofproto_parser.OFPActionOutput(out_port)]
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port,
dl_dst=dst,
dl_src=src,
dl_type=ether_types.ETH_TYPE_IP,
nw_proto=0x11
)
self.add_flow(datapath, 1, match, actions)
self._send_package(msg, datapath, in_port, actions)