[hyperscan][pkg-config] hyperscan 从0到1路线图

时间:2023-03-09 02:28:53
[hyperscan][pkg-config] hyperscan 从0到1路线图

经过一系列的研究学习,知识储备之后,终于,可以开始研究hyperscan了。

[knowledge][模式匹配] 字符匹配/模式匹配 正则表达式 自动机

[knowledge][perl][pcre][sed] sed / PCRE 语法/正则表达式

[development][PCRE] PCRE

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Now, let‘s hyperscan! 2333333

中文介绍:https://www.sdnlab.com/18773.html

官网: https://01.org/zh/hyperscan

正式入口:https://github.com/intel/hyperscan

开发者手册:http://intel.github.io/hyperscan/dev-reference/preface.html

官方例子程序:在源码的 examples/ 子目录。

其中用到了一个比较特殊的依赖库: Ragel http://www.colm.net/open-source/ragel/

Understanding the formal relationship between regular expressions and deterministic finite automata is key to using Ragel effectively.

理解正则表达式与确定有限状态自动机之间的关系,是用好这个库的关键。

提一个题外的编译系统 Ninja https://ninja-build.org/

编译一下:

┬─[tong@T7:~/Src/thirdparty/github]─[:: PM]
╰─>$ git clone git@github.com:intel/hyperscan.git
┬─[tong@T7:~/Src/thirdparty/github]─[:: PM]
╰─>$ cd hyperscan/
┬─[tong@T7:~/Src/thirdparty/github/hyperscan]─[:: PM]
╰─>$ mkdir BUILD
[root@dpdk hyperscan]# cd BUILD/

编译之前,需要安装boost,或者下载boost的源码。 仅在编译的时候需要boost的头文件而已,并不需要编译boost,也不需要安装boost的运行时库。

┬─[tong@T7:~/Src/thirdparty]─[:: PM]
╰─>$ wget https://dl.bintray.com/boostorg/release/1.66.0/source/boost_1_66_0.tar.bz2
┬─[tong@T7:~/Src/thirdparty]─[:: PM]
╰─>$ tar jxf boost_1_66_0.tar.bz2

还需有安装 Ragel-devel

[root@dpdk BUILD]# yum install ragel-devel

开始编译:

[root@dpdk BUILD]# cmake -DBOOST_ROOT=~/src/thirdparty/boost_1_66_0/ ../
[root@dpdk BUILD]# cmake --build .
[root@dpdk BUILD]# make

测试编译是否成功:

[root@dpdk BUILD]# ./bin/unit-hyperscan 

读开发手册:http://intel.github.io/hyperscan/dev-reference/

备注:

模糊匹配之

莱文斯坦距离:https://zh.wikipedia.org/wiki/萊文斯坦距離

汉明距离:https://zh.wikipedia.org/wiki/%E6%B1%89%E6%98%8E%E8%B7%9D%E7%A6%BB

API:http://intel.github.io/hyperscan/dev-reference/api_files.html

指定安装路径:

[root@dpdk BUILD]# cmake -DCMAKE_INSTALL_PREFIX=~/src/thirdparty/github/hyperscan/BUILD/DIST/ ../
[root@dpdk BUILD]# make
[root@dpdk BUILD]# make install

安装后的内容:

[root@dpdk DIST]# tree
.
├── include
│   └── hs
│   ├── hs_common.h
│   ├── hs_compile.h
│   ├── hs.h
│   └── hs_runtime.h
├── lib64
│   ├── libhs.a
│   ├── libhs_runtime.a
│   └── pkgconfig
│   └── libhs.pc
└── share
└── doc
└── hyperscan
└── examples
├── patbench.cc
├── pcapscan.cc
├── README.md
└── simplegrep.c directories, files

例子: share/doc/hyperscan/examples/simplegrep.c

编译:

gcc -o simplegrep simplegrep.c $(pkg-config --cflags --libs libhs)

引申内容:pkt-config

介绍:https://zh.wikipedia.org/wiki/Pkg-config

主页:https://www.freedesktop.org/wiki/Software/pkg-config/

 On most systems, pkg-config looks in /usr/lib/pkgconfig, /usr/share/pkgconfig, /usr/local/lib/pkg‐
config and /usr/local/share/pkgconfig for these files. It will additionally look in the colon-separated (on Windows,
semicolon-separated) list of directories specified by the PKG_CONFIG_PATH environment variable.

默认情况下,pkg-config会到以下四个目录中查找,/usr/lib/pkgconfig, /usr/share/pkgconfig, /usr/local/lib/pkg‐config and /usr/local/share/pkgconfig

之后,还会查找环境变量PKG_CONFIG_PATH 中的路径。

因为,我的hyperscan 没有安装在标准路径下,所以:

[tong@T7 pkgconfig]$ export PKG_CONFIG_PATH=~/Src/thirdparty/github/hyperscan/BUILD/DIST/lib64/pkgconfig
[tong@T7 pkgconfig]$ pkg-config --cflags --libs libhs
-I/root/src/thirdparty/github/hyperscan/BUILD/DIST/include/hs -L/root/src/thirdparty/github/hyperscan/BUILD/DIST/lib -lhs
[tong@T7 pkgconfig]$

增加一个软链接:

[root@dpdk DIST]# ln -rfs lib64/ lib
[root@dpdk DIST]# ll
total
drwxr-xr-x root root Jan : include
lrwxrwxrwx root root Jan : lib -> lib64
drwxr-xr-x root root Jan : lib64
drwxr-xr-x root root Jan : share
[root@dpdk DIST]#

编译:

[root@dpdk examples]# cat build.sh
#! /usr/bin/bash export PKG_CONFIG_PATH=/root/src/thirdparty/github/hyperscan/BUILD/DIST/lib64/pkgconfig
g++ -o simplegrep simplegrep.c $(pkg-config --cflags --libs libhs)

测试运行:

[root@dpdk examples]# ./simplegrep init simplegrep.c
Scanning bytes with Hyperscan
[root@dpdk examples]#

块内容模式匹配的例子:

https://github.com/tony-caotong/knickknack/tree/master/examples/hyperscan

效果如下:

[root@dpdk hyperscan]# ./test
Usage: ./test <pattern> <string>
[root@dpdk hyperscan]# ./test dafkj1234dlkfajf
id: , matched position:
[root@dpdk hyperscan]# ./test dafkj1234dl1234kfajf
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]#

查看例子源码,修改编译,可以做多模式匹配:

默认的两个pattern为 1234, 5678

效果如下:

[root@dpdk hyperscan]# ./test ""
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]# ./test "dfasfdsaf1234gadgdgdahg5678"
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]# ./test "dfasfdsaf1234gadgdgdahg5678dfsag"
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]#

修改例子中的宏,可以开启流匹配模式

默认的两个pattern为1234,5678. 运行时的俩个参数可以组合成一个流。

效果如下:

[root@dpdk hyperscan]# ./test "dfasfdsaf1234gad" "gdgdahg5678dfsag"
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]# ./test "dfasfdsaf123" "4gadgdgdahg5678dfsag"
id: , matched position:
id: , matched position:
[root@dpdk hyperscan]#

continue:

[hyperscan] hyperscan 1到1.5 --!!