Linux系統中字符串搜索命令ngrep的用法

這篇文章主要介紹“Linux系統中字符串搜索命令ngrep的用法”，在日常操作中，相信很多人在Linux系統中字符串搜索命令ngrep的用法問題上存在疑惑，小編查閱了各式資料，整理出簡單好用的操作方法，希望對大家解答”Linux系統中字符串搜索命令ngrep的用法”的疑惑有所幫助！接下來，請跟著小編一起來學習吧！

安裝ngrep
下載地址

代碼如下:

git clone git://git.code.sf.net/p/ngrep/code ngrep-code

進入目錄

代碼如下:

cd ngrep-code
./configure --with-pcap-includes=/usr/local/include/pcap
make
make install

選項

-h     is help/usage
-V    is version information
-q    is be quiet (don't print packet reception hash marks)靜默模式，如果沒有此開關，未匹配的數據包都以“#”顯示
-e    is show empty packets 顯示空數據包
-i     is ignore case 忽略大小寫
-v    is invert match 反轉匹配
-R   is don't do privilege revocation logic
-x    is print in alternate hexdump format 以16進制格式顯示
-X   is interpret match expression as hexadecimal 以16進制格式匹配
-w   is word-regex (expression must match as a word) 整字匹配
-p   is don't go into promiscuous mode 不使用混雜模式
-l     is make stdout line buffered
-D   is replay pcap_dumps with their recorded time intervals
-t     is print timestamp every time a packet is matched在每個匹配的包之前顯示時間戳
-T    is print delta timestamp every time a packet is matched顯示上一個匹配的數據包之間的時間間隔
-M   is don't do multi-line match (do single-line match instead)僅進行單行匹配
-I     is read packet stream from pcap format file pcap_dump 從文件中讀取數據進行匹配
-O   is dump matched packets in pcap format to pcap_dump 將匹配的數據保存到文件
-n    is look at only num packets 僅捕獲指定數目的數據包進行查看
-A   is dump num packets after a match匹配到數據包后Dump隨后的指定數目的數據包
-s    is set the bpf caplen
-S   is set the limitlen on matched packets
-W  is set the dump format (normal, byline, single, none) 設置顯示格式byline將解析包中的換行符
-c    is force the column width to the specified size 強制顯示列的寬度
-P   is set the non-printable display char to what is specified
-F   is read the bpf filter from the specified file 使用文件中定義的bpf(Berkeley Packet Filter)
-N   is show sub protocol number 顯示由IANA定義的子協議號
-d   is use specified device (index) instead of the pcap default

應用舉例：

捕獲所有post請求(加個-W byline 參數后,將解析包中的換行符)：

代碼如下:

ranger@ranger:~$ sudo ngrep -q -W byline "(POST).*"
interface: eth0 (192.168.122.0/255.255.254.0)
match: (POST).*
 
T 192.168.122.74:46048 -> 140.207.228.58:80 [A]
POST /Hotel/OTA_HotelSearch.asmx?wsdl HTTP/1.1.
Content-Type: text/xml; charset=UTF-8.
SOAPAction: http://ctrip.com/Request.
Accept-Encoding: gzip, deflate.
Content-Length: 1330.
Accept: */*.
Accept-Language: zh-cn.
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0).
UA-CPU: x86.
Accept-Encoding: gzip, deflate.
Connection: close.
Host: openapi.ctrip.com.
.
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <Request xmlns="http://ctrip.com/"> <requestXML>&lt;Request&gt;
&lt;Header AllianceID="***" SID="***" TimeStamp="1393554304685" RequestType="OTA_HotelSearch" Signature="B166CDF5422A6DA5BA81A08036E938E7"/&gt;
&lt;HotelRequest&gt;
&lt;RequestBody xmlns:ns="http://www.opentravel.org/OTA/2003/05" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt;
&lt;ns:OTA_HotelSearchRQ Version="1.0" PrimaryLangID="zh"
xsi:schemaLocation="http://www.opentravel.org/OTA/2003/05 OTA_HotelSearchRQ.xsd"

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