"^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:)))(%.+)?\s*$"

[–] YIj54yALOJxEsY20eU@lemm.ee 98 points 2 years ago

Lord have mercy

[–] dannym@lemmy.escapebigtech.info 76 points 2 years ago* (last edited 2 years ago) (1 children)

Please don't. Use regex to find something that looks like an IP then build a real parser. This is madness, its's extremely hard to read and a mistake is almost impossible to spot. Not to mention that it's slow.

Just parse [0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3} using regex (for v4) and then have some code check that all the octets are valid (and store the IP as a u32).

[–] Emma_Gold_Man@lemmy.dbzer0.com 8 points 2 years ago (3 children)

And dupe check. 0.0.0.0 and 000.000.000.000 may both be valid, but they resolve the same

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[–] MsPenguinette@lemmy.world 49 points 2 years ago (5 children)

IPv6 was a mistake. We should have just added an addition octet

[–] Centillionaire@kbin.social 69 points 2 years ago (5 children)

That would allow for like, 2 trillion devices? Feels like a bandaid, my dude. Next you’re gonna suggest a giant ice cube in the ocean once a year to stop global warming.

[–] stoy@lemmy.zip 13 points 2 years ago (1 children)

So add two more octets:

Moat companies will still just use something like 10.0.13.37.0.1

[–] 0xD 11 points 2 years ago (5 children)

IPv6 is not made with internal networks in mind lol

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[–] shasta@lemm.ee 8 points 2 years ago (2 children)

And nuke the hurricanes

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[–] Nalivai@discuss.tchncs.de 15 points 2 years ago (2 children)

Oh yeah, great, let's change the fundamental protocol on which all the networks in the world are based. Now two third of the devices in the world crashed because you tried to ping 192.168.0.0.1

[–] tilcica@lemm.ee 11 points 2 years ago

that WOULD be quite funny for the first second or 2....

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[–] rob64@startrek.website 35 points 2 years ago

https://imgs.xkcd.com/comics/perl_problems.png

[–] BeigeAgenda@lemmy.ca 29 points 2 years ago

It's always a treat to debug a regex of that size.

[–] SchizoDenji@lemm.ee 29 points 2 years ago

I knew there would be someone with the regex.

[–] takeda@lemmy.world 18 points 2 years ago* (last edited 2 years ago)

You're more of a perl programmer than network engineer :P

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[–] Static_Rocket@lemmy.world 165 points 2 years ago (3 children)

0.0.0.0/0 0::0/0

You didn't specify it couldn't be in CIDR block notation...

[–] Redjard@lemmy.dbzer0.com 24 points 2 years ago

::/0

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[–] Mr_Dr_Oink@lemmy.world 85 points 2 years ago (4 children)

0.0.0.0 /0 ::/0

SUCK MY DICK, GRU!

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[–] agilob@programming.dev 78 points 2 years ago* (last edited 2 years ago) (1 children)

:00 - :ff

Edit: Just learnt this can be also noted as:

:: - ::f

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[–] michaeljo94@discuss.tchncs.de 64 points 2 years ago (2 children)

0.0.0.0/0

[–] Emma_Gold_Man@lemmy.dbzer0.com 19 points 2 years ago (1 children)

Better hope the goon hasn't heard of IPv6 either, or you're toast

[–] oatscoop@midwest.social 22 points 2 years ago

::/0

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[–] Kolanaki@yiffit.net 61 points 2 years ago* (last edited 2 years ago)

This is gonna take a while...

0.0.0.0

0.0.0.1

0.0.0.2

0.0.0.3

...

[–] knobbysideup@lemm.ee 39 points 2 years ago* (last edited 2 years ago) (2 children)

0.0.0.0/0

::/0

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[–] rez_doggie@lemmy.world 38 points 2 years ago

0.0.0.0/0

[–] dan@upvote.au 25 points 2 years ago* (last edited 2 years ago) (3 children)

This reminds me of something I saw online maybe 20 years ago now. Someone created a torrent with a name like "every IP address ever (hacking tool)" and uploaded it to Suprnova, which ended up having thousands of people seeding it. It was just a text file with every IPv4 from 0.0.0.0 to 255.255.255.255 😂

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[–] doctorcrimson@lemmy.today 23 points 2 years ago* (last edited 2 years ago) (2 children)

ipv4 [0,255].[0,255].[0,255].[0,255]

ipv6 [0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]

[–] Hobo@lemmy.world 13 points 2 years ago* (last edited 2 years ago) (1 children)

This excludes all the ipv4 ips that have a 0 in the 2nd, 3rd, and 4th octets. Sorry but we're going to have to revoke your Network Engineering credentials.

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[–] tabularasa@lemmy.world 10 points 2 years ago (1 children)

Not to nitpick, but an IPv6 address is represented as eight groups of four hexadecimal digits separated by :. Like 2001:0db8:3333:4444:5555:6666:7777:8888.

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[–] SpasmodicColon@hexbear.net 23 points 2 years ago

127.0.0.1, I'm an introvert

[–] shootwhatsmyname@lemm.ee 22 points 2 years ago (1 children)

one of them has a 7 I’m pretty sure

[–] comrade_pibb@hexbear.net 7 points 2 years ago

wow don't doxx me plz

[–] GammaGames@beehaw.org 21 points 2 years ago

0.0.0.0/0

[–] Seasm0ke@lemmy.world 21 points 2 years ago

[–] Napain@lemmy.ml 20 points 2 years ago (1 children)

/32

[–] Z3k3@lemmy.world 21 points 2 years ago

That's only 1 ip (single host)

[–] spudwart@spudwart.com 16 points 2 years ago

I mean if I name them do I have to own the domain or…

[–] MonkderZweite@feddit.ch 15 points 2 years ago* (last edited 2 years ago)

My PC's is now Bob, My router's Billy...

[–] 018118055@sopuli.xyz 15 points 2 years ago

0/0

[–] quinkin@lemmy.world 15 points 2 years ago (1 children)

1 and 0. Some assembly required.

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[–] footfaults@hexbear.net 11 points 2 years ago* (last edited 2 years ago)

0.0.0.0/0

[–] vox@sopuli.xyz 10 points 2 years ago

ipv6

[–] xav@programming.dev 10 points 2 years ago

I'll start.

0.0.0.1: Sophie

Your turn.

[–] LemmysMum@lemmy.world 8 points 2 years ago (1 children)

127.0.0.1

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[–] HiddenLayer5@lemmy.ml 8 points 2 years ago (1 children)

Name every protocol

[–] QuazarOmega@lemy.lol 9 points 2 years ago (1 children)

[–] stringere@reddthat.com 12 points 2 years ago (1 children)

UDP

I'd love to tell you a joke about UDP but I'll never know if you get it.

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[–] DaveedMee@beehaw.org 7 points 2 years ago

127.0.0.1

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