python+pcap+dpkt抓包小实例
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通过pcap与dpkt抓包解包示例：
#!/usr/bin/env python # -*- coding: utf-8 -*- """ 网络数据包捕获与分析程序 """ import pcap import dpkt import json import re import time from urllib import unquote # 过滤输出目标ip dst_lists = [ ‘203.66.1.212‘, # nslookup dpdcs.4399sy.com.hk ‘52.74.10.186‘, # nslookup dpdcs.4399en.com ‘52.58.69.212‘, # nslookup dpdcs.4399sy.ru ‘220.241.11.3‘, # nslookup dpdcs.4399th.com ‘124.243.195.63‘, # nslookup sdkdcs.4399sy.com ‘42.62.106.216‘, # nslookup udpdcs.4399sy.com ‘42.62.106.230‘, # nslookup udpdcs.4399sy.com ] req_data = "" times = 0 def capt_data(eth_name="eth0", p_type=None): """ 捕获网卡数据包 :param eth_name 网卡名，eg. eth0,eth3... :param p_type 日志捕获类型 1：sdk日志用例分析 2：目标域名过滤输出 3：原始数据包 :return: """ pc = pcap.pcap(eth_name) pc.setfilter(‘tcp port 80‘) # 设置监听过滤器 print ‘start capture....‘ if pc: for p_time, p_data in pc: # p_time为收到时间，p_data为收到数据 anly_capt(p_time, p_data, p_type) def anly_capt(p_time, p_data, p_type): """ 解析数据包 :param p_data 收到数据 :param p_type 日志捕获类型 1：sdk日志用例分析 2：目标域名过滤输出 3：原始数据包 :return: """ p = dpkt.ethernet.Ethernet(p_data) if p.data.__class__.__name__ == ‘IP‘: ip_data = p.data src_ip = ‘%d.%d.%d.%d‘ % tuple(map(ord, list(ip_data.src))) dst_ip = ‘%d.%d.%d.%d‘ % tuple(map(ord, list(ip_data.dst))) if p.data.data.__class__.__name__ == ‘TCP‘: tcp_data = p.data.data if tcp_data.dport == 80: # print tcp_data.data if tcp_data.data: # 调用日志模块，对日志进行处理 if p_type == 1: # sdk日志用例分析 if dst_ip in dst_lists: tmp = tcp_data.data.strip() global req_data, times if tmp.startswith("POST") or tmp.startswith("GET"): # or times > 0 if req_data: haiwai_log_case(req_data) req_data = tmp + "\n" # times = 0 else: req_data = req_data + tmp # times = times + 1 elif p_type == 2: # 目标域名过滤输出 if dst_ip in dst_lists: print "tcp_data:", tcp_data.data else: # 无过滤条件输出 print "tcp_data:", tcp_data.data # android 日誌類型，从data中获取 log_type_from_data = { ‘open_game‘: u‘[打开游戏]‘, ‘network_check‘: u‘[网络监测]‘, ‘open_login‘: u‘[登录界面前]‘, ‘select_server‘: u‘[选服日志]‘, ‘create_role‘: u‘[创角日志]‘, ‘role_level_change‘: u‘[等级日志]‘, # 海外,俄语 ‘activity_open‘: u‘[打开游戏]‘, ‘load_start_before_login‘: u‘[加载开始]‘, ‘load_finish_before_login‘: u‘[加载结束]‘, ‘activity_before_login‘: u‘[登录界面前]‘, ‘click_enter‘: u‘[进入游戏]‘, ‘get_user_server_login‘: u‘[选服日志]‘, ‘user_create_role‘: u‘[创角日志]‘, ‘role_login‘: u‘[角色登录]‘, ‘enter_success‘: u‘[成功进入游戏]‘, ‘role_level‘: u‘[等级日志]‘, ‘user_online‘: u‘[在线日志]‘, ‘exit_success‘: u‘[退出游戏]‘, } # ios日誌類型，从请求资源路径获取 log_type_from_path = { ‘activity_open.php‘: u‘[打开游戏]‘, ‘load_start_before_login.php‘: u‘[加载开始]‘, ‘load_finish_before_login.php‘: u‘[加载结束]‘, ‘activity_before_login.php‘: u‘[登录界面前]‘, ‘click_enter.php‘: u‘[进入游戏]‘, ‘get_user_server_login.php‘: u‘[选服日志]‘, ‘user_create_role.php‘: u‘[创角日志]‘, ‘role_login.php‘: u‘[角色登录]‘, ‘enter_success.php‘: u‘[成功进入游戏]‘, ‘user_online.php‘: u‘[在线日志]‘, ‘role_level.php‘: u‘[等级日志]‘, ‘exit_success.php‘: u‘[退出游戏]‘, ‘share.php‘: u‘[分享日志]‘, ‘init_info.php‘: u‘[初始化日志]‘, ‘event.php‘: u‘[事件日志]‘, ‘user_login.php‘: u‘[user_login]‘, ‘user_server_login.php‘: u‘[user_server_login]‘, ‘enter_game.php‘: u‘[enter_game]‘, } # 过滤path filter_out_list = [ ‘u/‘, ‘plugin/error/check‘, ‘service/version/get_info‘, ] # 过滤打印出属于列表中的host的日志。 host_list = [ ‘dpdcs.4399sy.com.hk‘, ‘dpdcs.4399en.com‘, ‘dpdcs.4399sy.ru‘, ‘dpdcs.4399th.com‘, ‘sdkdcs.4399sy.com‘, ‘udpdcs.4399sy.com‘, ] def formattime(t): # 日期字段格式化 return time.strftime(‘%c‘, time.gmtime(t + 8 * 3600)) def req_to_dict(req_string): """ 将请求数据转换为dic :param req_string: :return: """ req_dict = {} req_string = req_string.strip() if len(req_string) > 0: req_string = unquote(req_string) # print "req_string_after_unquote:",req_string m1 = re.search("(GET|POST)(.*)\?(.*)HTTP/1.1", req_string) # (method,path,param) m2 = re.search("Host:(.*)", req_string) # (host,) # m3 = re.search("\sdata=(.*)\s", req_string) # (body,) m4 = re.search("\sdata=([\s\S]*)", req_string) # (body,) # m5 = re.search("eventTime\":\"(\d+)", req_string) # (eventTime,) m5 = re.search("eventTime\"\s*:\s*\"(\d+)", req_string) if m1: req_dict["method"] = m1.group(1).strip() req_dict["path"] = m1.group(2).strip()[1:] param_string = m1.group(3).strip() if param_string: param_string = param_string.split("&") param_dict = {} for item in param_string: tmp_list = item.split("=") if len(tmp_list) > 1: param_dict[tmp_list[0]] = tmp_list[1] req_dict["param"] = param_dict if m2: req_dict["host"] = m2.group(1).strip() if m4: try: body = m4.group(1).replace("\n", "") body = json.loads(body) except ValueError: print "\033[1;31;40m" print "m4:Error:body ValueError,req_string-->%s" % req_string print "\033[0m" body = {} req_dict["body"] = body if m5: req_dict["eventTime"] = formattime(int(m5.group(1))) return req_dict def haiwai_log_assert(req_dict): """ 日志断言处理,输出分析结果 :param req_dict: :return: """ # 从 data 中获取日志类型 if isinstance(req_dict, dict) and req_dict.get("body"): if req_dict.get("body").get("data"): data_type = req_dict.get("body").get("data").keys() data_type_set = set(data_type) types_key_set = set(log_type_from_data.keys()) intersect = data_type_set.intersection(types_key_set) if intersect: log_type = intersect.pop() print "\033[1;31;40m %s log pass!--from body data || EventTime:-->[%s] \033[0m" % ( log_type_from_data.get(log_type), req_dict.get("eventTime")) print req_dict else: if ‘common‘ in data_type and len(data_type) == 2: data_type.remove(‘common‘) print "\033[1;31;40m %s log not register!--from body data \033[0m" % data_type # 从 path 中获取日志类型 path = req_dict.get("path") host = req_dict.get("host") if host in host_list: if path in log_type_from_path.keys(): eventTime = "" if req_dict.get("eventTime"): eventTime = req_dict.get("eventTime") else: if req_dict.get("param"): eventTime = req_dict.get("param").get("time") if eventTime: eventTime = formattime(int(eventTime)) print "\033[1;31;40m %s log pass--from url || EventTime:-->[%s] \033[0m" % ( log_type_from_path.get(path), eventTime) print req_dict elif path and path not in filter_out_list: print "\033[1;31;40m %s log not register!--from url! \033[0m" % path print req_dict def client_log_check(log_type, req_dict, platform="sy"): """ 检查SDK客户端请求字段，返回测试结果集 :param log_type: 日志类型 :param req_dict: 日志字典 :param platform: 测试平台 :return: """ pass def haiwai_log_case(req_string): """ 日志用例集 一：将数据包转换为dict 二：对日志分析处理，输出测试结果 """ req_dict = req_to_dict(req_string) haiwai_log_assert(req_dict) if __name__ == ‘__main__‘: try: capt_data("eth3", 1) except TypeError: capt_data("eth3", 1)
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