doc: hyperscan information updated

Signed-off-by: jason taylor <jtfas90@gmail.com>

doc/userguide/performance/hyperscan.rst

@@ -4,133 +4,81 @@ Hyperscan
 Introduction
 ~~~~~~~~~~~~
 
-"Hyperscan is a high-performance multiple regex matching library." https://www.hyperscan.io
+"Hyperscan is a high performance regular expression matching library (...)" (https://www.intel.com/content/www/us/en/developer/articles/technical/introduction-to-hyperscan.html)
 
-In Suricata it can be used to perform multi pattern matching (mpm). Support was implemented by Justin Viiret and Jim Xu from Intel: https://github.com/inliniac/suricata/pull/1965, https://redmine.openinfosecfoundation.org/issues/1704
+In Suricata it can be used to perform multi pattern matching (mpm) or single pattern matching (spm).
 
-Compilation
-~~~~~~~~~~~
+Support for hyperscan in Suricata was initially implemented by Justin Viiret and Jim Xu from Intel via https://github.com/OISF/suricata/pull/1965.
 
-It's possible to pass --with-libhs-includes=/usr/local/include/hs/ --with-libhs-libraries=/usr/local/lib/, although by default this shouldn't be necessary. Suricata should pick up Hyperscan's pkg-config file automagically.
+Hyperscan is only for Intel x86 based processor architectures at this time. For ARM processors, vectorscan is a drop in replacement for hyperscan, https://github.com/VectorCamp/vectorscan. 
 
-When Suricata's compilation succeeded, you should have:
-
-::
-
-
-  suricata --build-info|grep Hyperscan
-    Hyperscan support:                       yes
-
-
-Using Hyperscan
-~~~~~~~~~~~~~~~
-
-To use the hyperscan support edit your suricata.yaml. Change the mpm-algo and spm-algo values to 'hs'.
-
-Alternatively, use this command-line option: --set mpm-algo=hs --set spm-algo=hs
 
+Basic Installation (Package)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+Some Linux distributions include hyperscan in their respective package collections.
 
+Fedora 37+/Centos 8+: sudo dnf install hyperscan-devel
+Ubuntu/Debian: sudo apt-get install libhyperscan-dev
 
-Ubuntu Hyperscan Installation
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-To use Suricata with Hyperscan support, install dependencies:
+Advanced Installation (Source)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+Hyperscan has the following dependencies in order to build from
+source:
 
-::
-
-
-  apt-get install cmake ragel
+* boost development libraries (minimum boost library version is 1.58)
+* cmake
+* C++ compiler (e.g. gcc-c++)
+* libpcap development libraries
+* pcre2 development libraries
+* python3
+* ragel
+* sqlite development libraries
 
-libboost headers
-----------------
-
-Hyperscan needs the libboost headers from 1.58+.
-
-On Ubuntu 15.10 or 16.04+, simply do:
+**Note:** git is an additional dependency if cloning the
+hyperscan GitHub repository. Otherwise downloading the
+hyperscan zip from the GitHub repository will work too.
 
+The steps to build and install hyperscan are:
 
 ::
 
-
-  apt-get install libboost-dev
-
-
-Trusty
-------
-
-Trusty has 1.57, so it's too old. We can grab a newer libboost version, but we *don't* install it system wide. It's only the headers we care about during compilation of Hyperscan.
-
-
-::
-
-
-  sudo apt-get python-dev libbz2-dev
-  wget https://dl.bintray.com/boostorg/release/1.66.0/source/boost_1_66_0.tar.gz
-  tar xvzf boost_1_66_0.tar.gz
-  cd boost_1_66_0
-  ./bootstrap.sh --prefix=~/tmp/boost-1.66
-  ./b2 install
-
-Hyperscan
----------
-
-We'll install version 5.0.0.
-
-
-::
-
-
   git clone https://github.com/intel/hyperscan
   cd hyperscan
-  mkdir build
-  cd build
-  cmake -DBUILD_STATIC_AND_SHARED=1 ../
-
-If you have your own libboost headers, use this cmake line instead:
+  cmake -DBUILD_STATIC_AND_SHARED=1
+  cmake --build ./
+  sudo cmake --install ./
 
-::
+**Note:** Hyperscan can take a a long time to build/compile.
 
+**Note:** It may be necessary to add /usr/local/lib or
+/usr/local/lib64 to the `ld` search path. Typically this is
+done by adding a file under /etc/ld.so.conf.d/ with the contents
+of the directory location of libhs.so.5 (for hyperscan 5.x).
 
-  cmake -DBUILD_STATIC_AND_SHARED=1 -DBOOST_ROOT=~/tmp/boost-1.66 ../
-
-Finally, make and make install:
-
-::
-
-
-  make
-  sudo make install
-
-Compilation can take a long time, but it should in the end look something like this:
 
+Using Hyperscan
+~~~~~~~~~~~~~~~
 
+Confirm that the suricata version installed has hyperscan enabled.
 ::
 
 
-  Install the project...
-  -- Install configuration: "RELWITHDEBINFO"
-  -- Installing: /usr/local/lib/pkgconfig/libhs.pc
-  -- Up-to-date: /usr/local/include/hs/hs.h
-  -- Up-to-date: /usr/local/include/hs/hs_common.h
-  -- Up-to-date: /usr/local/include/hs/hs_compile.h
-  -- Up-to-date: /usr/local/include/hs/hs_runtime.h
-  -- Installing: /usr/local/lib/libhs_runtime.a
-  -- Installing: /usr/local/lib/libhs_runtime.so.4.2.0
-  -- Installing: /usr/local/lib/libhs_runtime.so.4.2
-  -- Installing: /usr/local/lib/libhs_runtime.so
-  -- Installing: /usr/local/lib/libhs.a
-  -- Installing: /usr/local/lib/libhs.so.4.2.0
-  -- Installing: /usr/local/lib/libhs.so.4.2
-  -- Installing: /usr/local/lib/libhs.so
+  suricata --build-info | grep Hyperscan
+    Hyperscan support:                       yes
 
-Note that you may have to add /usr/local/lib to your ld search path
 
+To use hyperscan support, edit the suricata.yaml.
+Change the mpm-algo and spm-algo values to 'hs'.
 
-::
+Alternatively, use this command-line option: --set mpm-algo=hs --set spm-algo=hs
 
+**Note**: The default suricata.yaml configuration settings for
+mpm-algo and spm-algo are "auto". Suricata will use hyperscan
+if it is present on the system in case of the "auto" setting.
 
-  echo "/usr/local/lib" | sudo tee --append /etc/ld.so.conf.d/usrlocal.conf
-  sudo ldconfig
 
+If the current suricata installation does not have hyperscan
+support, refer to :ref:`installation`