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controller.py
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from p4utils.utils.helper import load_topo
import os
import p4runtime_sh.shell as sh
from threading import Thread
from google.protobuf.json_format import MessageToDict
import base64
import time
import json
from scapy.all import *
import argparse
import sys
import time
sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), "utils/"))
from utils import bmv2, helper
import grpc
# 获取特征的列表
packet_features = []
# 不处理的特定端口号的数据包
filter_ports = [53, 161, 162, 21, 20, 25, 587, 465, 143, 993, 110, 995]
five_tuple_list = []
flow_dict = {}
pktlist = []
def printGrpcError(e):
print("gRPC Error:", e.details(), end="")
status_code = e.code()
print("(%s)" % status_code.name, end="")
traceback = sys.exc_info()[2]
print("[%s:%d]" % (traceback.tb_frame.f_code.co_filename, traceback.tb_lineno))
def monitor_pktlist():
last_processed_index = 0
while True:
current_len = len(pktlist)
if current_len > last_processed_index:
for i in range(last_processed_index, current_len):
pkt = pktlist[i]
# 使用Scapy解析数据包
response_dict = MessageToDict(pkt)
decoded_metadata_values = base64.b64decode(response_dict['packet']['payload'])
packet = Ether(decoded_metadata_values) # type: ignore
if IP in packet: # type: ignore
ip_layer = packet[IP] # type: ignore
if UDP in ip_layer: # type: ignore
udp_layer = ip_layer[UDP] # type: ignore
# 提取五元组
src_ip = ip_layer.src
dst_ip = ip_layer.dst
protocol = ip_layer.proto
src_port = udp_layer.sport
dst_port = udp_layer.dport
elif TCP in ip_layer: # type: ignore
tcp_layer = ip_layer[TCP] # type: ignore
# 提取五元组
src_ip = ip_layer.src
dst_ip = ip_layer.dst
protocol = ip_layer.proto
src_port = tcp_layer.sport
dst_port = tcp_layer.dport
if (src_ip, dst_ip, src_port, dst_port, protocol) in five_tuple_list:
continue
else:
# 添加正向流和反向流五元组
five_tuple_list.append((src_ip, dst_ip, src_port, dst_port, protocol))
five_tuple_list.append((dst_ip, src_ip, dst_port, src_port, protocol))
else:
print("不是IP数据包")
last_processed_index = current_len
print(five_tuple_list)
time.sleep(1) # 每隔1秒检查一次 pktlist
# 监控 five_tuples 列表并处理新增元素的函数
def monitor_five_tuples(sh):
last_checked_length = 0
te_check_flow = sh.TableEntry('check_flow')(action='NoAction')
te_detect_flow = sh.TableEntry('detect_flow')(action='record_flow')
while True:
current_length = len(five_tuple_list)
if current_length > last_checked_length:
for i in range(last_checked_length, current_length):
# 下发check_flow流表
te_check_flow.match['hdr.ipv4.src_addr'] = five_tuple_list[i][0]
te_check_flow.match['hdr.ipv4.dst_addr'] = five_tuple_list[i][1]
te_check_flow.match['meta.srcport'] = str(five_tuple_list[i][2])
te_check_flow.match['meta.dstport'] = str(five_tuple_list[i][3])
te_check_flow.match['hdr.ipv4.protocol'] = str(five_tuple_list[i][4])
te_check_flow.insert()
# 开启线程监控five_tuple_list,获取五元组并下发流表
te_detect_flow.match['hdr.ipv4.src_addr'] = five_tuple_list[i][0]
te_detect_flow.match['hdr.ipv4.dst_addr'] = five_tuple_list[i][1]
te_detect_flow.match['meta.srcport'] = str(five_tuple_list[i][2])
te_detect_flow.match['meta.dstport'] = str(five_tuple_list[i][3])
te_detect_flow.match['hdr.ipv4.protocol'] = str(five_tuple_list[i][4])
te_detect_flow.action['index'] = str(i)
te_detect_flow.insert()
last_checked_length = current_length
def monitor_flow(sh):
te_flow = sh.CounterEntry('packets_bytes_counter')
while True:
sessions = te_flow.read()
for session in sessions:
print(session.index)
print("包数：", session.packet_count)
print("字节数：", session.byte_count)
if session.index < len(five_tuple_list):
if five_tuple_list[session.index] in flow_dict:
if len(flow_dict[five_tuple_list[session.index]]) <= 5:
flow_dict[five_tuple_list[session.index]].append((session.packet_count, session.byte_count))
else:
flow_dict[five_tuple_list[session.index]] = [(session.packet_count, session.byte_count)]
print()
time.sleep(0.5)
# 处理大流还是小流
def print_flow_dict():
"""
这里获取特征
forward_packets,forward_bytes, total_packets, total_bytes, backward_packets, backward_bytes,
forward_packets_per_sec, backward_packets_per_sec, forward_bytes_per_sec, backward_bytes_per_sec,
forward_avg_packet_length_per_flow, back_avg_packet_length_per_flow
"""
while True:
if flow_dict:
print(flow_dict)
time.sleep(2)
def main(p4info_path, bmv2_json_path):
try:
sh.setup(
device_id=1,
grpc_addr='0.0.0.0:9559',
election_id=(0,1), # (high, low)
config=sh.FwdPipeConfig(p4info_path, bmv2_json_path)
)
"""
te = sh.TableEntry('<table_name>')(action='<action_name>')
te.match['<name>'] = '<value>'
te.action['<name>'] = '<value>'
te.insert()
"""
# 下发ipv4_lpm表项
te_ipv4_lpm = sh.TableEntry('ipv4_lpm')(action='ipv4_forward')
te_ipv4_lpm.match['hdr.ipv4.dst_addr'] = '10.1.1.2'
te_ipv4_lpm.action['dstAddr'] = '00:00:0a:01:01:02'
te_ipv4_lpm.action['port'] = '1'
te_ipv4_lpm.match['hdr.ipv4.dst_addr'] = '10.1.2.2'
te_ipv4_lpm.action['port'] = '2'
te_ipv4_lpm.action['dstAddr'] = '00:00:0a:01:02:02'
te_ipv4_lpm.insert()
ipv4_lpm_sessions = te_ipv4_lpm.read()
for session in ipv4_lpm_sessions:
print(session)
# 添加mirroring_add 指令
te_clone = sh.CloneSessionEntry(100)
te_clone.add(255)
te_clone.insert()
clone_sessions = te_clone.read()
# 输出 Clone Session entries
for session in clone_sessions:
print(session)
packet_in = sh.PacketIn()
def packet_sniff():
while True:
pkt = packet_in.sniff(timeout=1)
for msg in pkt:
# sys.stdout.flush()
if msg not in pktlist:
pktlist.append(msg)
# print(pktlist)
sniffer_thread = Thread(target=packet_sniff)
sniffer_thread.start()
pktlist_thread = Thread(target=monitor_pktlist)
pktlist_thread.start()
# 下发流表表项
# 下发流是否需要被检测表项
five_tuples_thread = Thread(target=monitor_five_tuples, args=(sh,))
five_tuples_thread.start()
# 读取正向流和反向流的数据
flow_thread = Thread(target=monitor_flow, args=(sh,))
flow_thread.start()
# 处理flow_list，得出流相关特征
# 这里需要有打流工具，目前找找看DITG
# 输出flow_list
print_thread = Thread(target=print_flow_dict)
print_thread.start()
except KeyboardInterrupt:
print(" Shutting down.")
except grpc.RpcError as e:
printGrpcError(e)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument(
"--p4-file", help="Path to P4 file", type=str, action="store", required=False
)
args = parser.parse_args()
p4_file = args.p4_file.split("/")[-1] # 路径的最后一个为文件名
name = p4_file.split(".")[0]
# os.system()是返回状态码，如果参数正确，则result为0
result = os.system(
f"p4c --target bmv2 --arch v1model --p4runtime-files {name}.p4info.txt "
+ args.p4_file # args.p4_file是文件路径
)
p4info_path = "./edge_switch.p4info.txt"
bmv2_json_path = "./edge_switch.json"
main(p4info_path, bmv2_json_path)