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PcapGraphSample
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pcapGraph.py
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pcapGraph.py
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import dpkt # version 1.9.0
import socket
from graphviz import Digraph
# 解析したいpcapファイル
pcapfile = './test.pcap'
# ツリー構造Gを宣言
# formatはpngを指定(他にはPDF, PNG, SVGなどが指定可)
G = Digraph(format='png')
G.attr('node', shape='circle')
# pcapファイル読み込み
with open(pcapfile, "rb") as f:
pcr = dpkt.pcap.Reader(f)
frame_count = 0
flow_list = {}
for t, buf in pcr:
frame_count += 1
try:
eth = dpkt.ethernet.Ethernet(buf)
except:
print("Fail parse FrameNo: ", frame_count, '...skipped')
continue
# 型がIPアドレスなら
if type(eth.data) == dpkt.ip.IP:
ip = eth.data
# 送信元IPアドレス
src = socket.inet_ntoa(ip.src)
# 送信先IPアドレス
dst = socket.inet_ntoa(ip.dst)
flow_word = src + " to " + dst
# 同じipアドレスがflow_listにあれば
if flow_word in flow_list:
# パケットサイズを更新
flow_list[flow_word] += len(str(buf))
else:
# グラフに辺を追加
G.edge(src, dst)
# パケットサイズの初期値を代入
flow_list[flow_word] = len(str(buf))
# 結果の表示
for k,v in flow_list.items():
print(k, ':', v, '[Byte]')
# 構築したツリー構造をflow_tree.pngで保存
G.render('flow_tree')
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