Thank you, THANK YOU  Travis,  it worked perfectly.  It is the first
time I received such a detailed instruction that would work without
any hinch.
Every time I'll run this code I will remember you :-)  Thank you again.

On Thu, Feb 11, 2021 at 11:39 AM Travis Rodman
<trod...@apple.com.invalid> wrote:
>
> Hi Syscon,
>
> From bash/zsh:
>
> 1. install leiningen (https://leiningen.org)
> 2. `cd /file/location/you/store/project/sources`
> 3. run `lein new htaccess`
>    (this will create a folder and project stub)
> 4. `cat /code/from/the/email > htaccess/src/htaccess/core.clj`
> 5. cd htaccess
> 6. `lein repl`
>
> on my machine, this gives me a prompt that looks like this:
> ------------------------------------------------------------------------------
> nREPL server started on port 63648 on host 127.0.0.1 - nrepl://127.0.0.1:63648
> REPL-y 0.4.4, nREPL 0.6.0
> Clojure 1.8.0
> OpenJDK 64-Bit Server VM 1.8.0_265-b01
>     Docs: (doc function-name-here)
>           (find-doc "part-of-name-here")
>   Source: (source function-name-here)
>  Javadoc: (javadoc java-object-or-class-here)
>     Exit: Control+D or (exit) or (quit)
>  Results: Stored in vars *1, *2, *3, an exception in *e
>
> htaccess.core=>
> ------------------------------------------------------------------------------
>
> at "htaccess.core=>" you can paste in:
> (return-matching-blocks "ip.of.my.interest" "/path/to/my/htaccess")
>
> It will return a list of all the matching ip/masks from the lines that 
> contain "Require not ip ".
> Let me know if you would like me to clarify any of the instructions.
>
> Alright, that's it. Good luck with managing that list.
>
> Best Regards,
> Travis
>
>
> On Wed, Feb 10, 2021 at 11:09:30PM -0700, syscon edm wrote:
> > Thanks Travis,  I'm surprised; there is a lot I have to learn when it
> > comes to IP matching to CIDR
> > I was under the impression that just looking at the beginning of CIDR
> > address and I would be able to find the match.  How wrong I was :-/
> >
> > Now, I can install * dev-lang/clojure  on Linux
> > How do I run that code you gave me from the command line?
> > I suppose I need to put it into a file, now which part?
> >
> > Thanks,
> > Joseph
> >
> > On Wed, Feb 10, 2021 at 9:33 PM Travis Rodman <trod...@apple.com.invalid> 
> > wrote:
> > >
> > > Hi Syscon,
> > >
> > > Okay, so I wrote up a little program to parse your .htaccess file, and 
> > > this comes back as a match:
> > > 212.129.0.0/1
> > >
> > > Here is the code (Clojure), so you can parse any future mystery 
> > > rejections, if you like.
> > > ----------------------------------------------------------------------------------------------------------------------------------------------------
> > > (ns htaccess.core)
> > >
> > > (defn parse-ip [s]
> > >   (let [v (clojure.string/split s #"/")]
> > >     (flatten
> > >       (if (< (count v) 2)
> > >         [(clojure.string/split (get v 0) #"\.") "32"]
> > >         [(clojure.string/split (get v 0) #"\.") (get v 1)]))))
> > >
> > > (defn convert-str-to-binary-str [s]
> > >   (clojure.string/replace (format "%0$8s" 
> > > (java.lang.Integer/toBinaryString (java.lang.Integer/parseUnsignedInt 
> > > (clojure.string/trim s)))) " " "0"))
> > >
> > > (defn convert-mask-to-binary-str [s]
> > >   (let [m (java.lang.Integer/parseUnsignedInt (clojure.string/trim s))
> > >         m (if (< 32 m) 32 m)
> > >         l0 (repeatedly m (fn [] 1))
> > >         l1 (repeatedly (- 32 m) (fn [] 0))
> > >         v  (apply str (flatten [l0 l1]))]
> > >     v))
> > >
> > > (defn binary-string-to-int [s] (java.lang.Integer/parseUnsignedInt 
> > > (clojure.string/trim s) 2))
> > >
> > > (defn masked? [p m]
> > >   (let [s0  p
> > >         s1  m
> > >         p0  (parse-ip s0)
> > >         p1  (parse-ip s1)
> > >         v0  (apply str (map convert-str-to-binary-str (take 4 p0)))
> > >         v1  (apply str (map convert-str-to-binary-str (take 4 p1)))
> > >         m   (convert-mask-to-binary-str (last p1))
> > >         im  (binary-string-to-int m)
> > >         iv0 (binary-string-to-int v0)
> > >         iv1 (binary-string-to-int v1)]
> > >     (= (bit-and im iv0) (bit-and im iv1))))
> > >
> > > (defn get-mask-data [s]
> > >   (map (fn [s] (clojure.string/replace s "Require not ip " ""))
> > >     (filter (fn [s] (clojure.string/includes? s "Require not ip "))
> > >       (with-open [rdr (clojure.java.io/reader s)]
> > >         (doall (line-seq rdr))))))
> > >
> > > (defn return-matching-blocks [p f] (filter (fn [a] (masked? p a)) 
> > > (get-mask-data f)))
> > >
> > > ;(return-matching-blocks "1.202.0.0" 
> > > "/Users/travis/data/projects/clojure/htaccess/resources/htaccess_backup")
> > > ;(return-matching-blocks "159.14.184.11" 
> > > "/Users/travis/data/projects/clojure/htaccess/resources/htaccess_backup")
> > > ;("212.129.0.0/1")
> > > ----------------------------------------------------------------------------------------------------------------------------------------------------
> > >
> > > If you have other IPs that are a mystery, and don't know how to set up 
> > > Clojure, you can just send them my way, I can easily re-run this. I'm not
> > > going to chuck the code any time soon.
> > >
> > > HTH,
> > > Travis
> > >
> > >
> > > On Wed, Feb 10, 2021 at 05:25:27PM -0800, Travis Rodman wrote:
> > > > Thanks, I got it... I will get back to you.
> > > >
> > > > Regards,
> > > > Travis
> > > >
> > > > On Wed, Feb 10, 2021 at 06:02:45PM -0700, syscon edm wrote:
> > > > > Thank you, I sent you the .htaccess file to the email address you 
> > > > > provided.
> > > >
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